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Calendar - Wikipedia

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property="og:image:width" content="640"> <meta property="og:image:height" content="853"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="Calendar - Wikipedia"> <meta property="og:type" content="website"> <link rel="preconnect" href="//upload.wikimedia.org"> <link rel="alternate" media="only screen and (max-width: 640px)" href="//en.m.wikipedia.org/wiki/Calendar"> <link rel="alternate" type="application/x-wiki" title="Edit this page" href="/w/index.php?title=Calendar&amp;action=edit"> <link rel="apple-touch-icon" href="/static/apple-touch/wikipedia.png"> <link rel="icon" href="/static/favicon/wikipedia.ico"> <link rel="search" type="application/opensearchdescription+xml" href="/w/rest.php/v1/search" title="Wikipedia (en)"> <link rel="EditURI" type="application/rsd+xml" href="//en.wikipedia.org/w/api.php?action=rsd"> <link rel="canonical" href="https://en.wikipedia.org/wiki/Calendar"> <link rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en"> <link rel="alternate" type="application/atom+xml" title="Wikipedia Atom feed" href="/w/index.php?title=Special:RecentChanges&amp;feed=atom"> <link rel="dns-prefetch" href="//meta.wikimedia.org" /> <link rel="dns-prefetch" href="//login.wikimedia.org"> </head> <body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-Calendar rootpage-Calendar skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Jump to content</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Main menu" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Main menu</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" 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class="mw-list-item"><a href="/wiki/Portal:Current_events" title="Articles related to current events"><span>Current events</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Special:Random" title="Visit a randomly selected article [x]" accesskey="x"><span>Random article</span></a></li><li id="n-aboutsite" class="mw-list-item"><a href="/wiki/Wikipedia:About" title="Learn about Wikipedia and how it works"><span>About Wikipedia</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us" title="How to contact Wikipedia"><span>Contact us</span></a></li> </ul> </div> </div> <div id="p-interaction" class="vector-menu mw-portlet mw-portlet-interaction" > <div class="vector-menu-heading"> Contribute </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-help" class="mw-list-item"><a href="/wiki/Help:Contents" title="Guidance on how to use and edit Wikipedia"><span>Help</span></a></li><li id="n-introduction" class="mw-list-item"><a href="/wiki/Help:Introduction" title="Learn how to edit Wikipedia"><span>Learn to edit</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:Community_portal" title="The hub for editors"><span>Community portal</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Special:RecentChanges" title="A list of recent changes to Wikipedia [r]" accesskey="r"><span>Recent changes</span></a></li><li id="n-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_upload_wizard" title="Add images or other media for use on Wikipedia"><span>Upload file</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Main_Page" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="The Free Encyclopedia" src="/static/images/mobile/copyright/wikipedia-tagline-en.svg" width="117" height="13" style="width: 7.3125em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Special:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Search Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> 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class="vector-dropdown-label-text">Appearance</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&amp;utm_medium=sidebar&amp;utm_campaign=C13_en.wikipedia.org&amp;uselang=en" class=""><span>Donate</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:CreateAccount&amp;returnto=Calendar" title="You are encouraged to create an account and log in; however, it is not mandatory" class=""><span>Create account</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:UserLogin&amp;returnto=Calendar" title="You&#039;re encouraged to log in; however, it&#039;s not mandatory. [o]" accesskey="o" class=""><span>Log in</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Log in and more options" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personal tools" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personal tools</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="User menu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&amp;utm_medium=sidebar&amp;utm_campaign=C13_en.wikipedia.org&amp;uselang=en"><span>Donate</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&amp;returnto=Calendar" title="You are encouraged to create an account and log in; however, it is not mandatory"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Create account</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:UserLogin&amp;returnto=Calendar" title="You&#039;re encouraged to log in; however, it&#039;s not mandatory. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Log in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pages for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"><!-- CentralNotice --></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contents" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contents</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-Etymology" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Etymology"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Etymology</span> </div> </a> <ul id="toc-Etymology-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-History" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#History"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>History</span> </div> </a> <ul id="toc-History-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Systems" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Systems"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Systems</span> </div> </a> <button aria-controls="toc-Systems-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Systems subsection</span> </button> <ul id="toc-Systems-sublist" class="vector-toc-list"> <li id="toc-Solar" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Solar"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Solar</span> </div> </a> <ul id="toc-Solar-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Lunar" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Lunar"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Lunar</span> </div> </a> <ul id="toc-Lunar-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Lunisolar" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Lunisolar"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Lunisolar</span> </div> </a> <ul id="toc-Lunisolar-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Subdivisions" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Subdivisions"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Subdivisions</span> </div> </a> <ul id="toc-Subdivisions-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Other_types" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Other_types"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Other types</span> </div> </a> <button aria-controls="toc-Other_types-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Other types subsection</span> </button> <ul id="toc-Other_types-sublist" class="vector-toc-list"> <li id="toc-Arithmetical_and_astronomical" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Arithmetical_and_astronomical"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1</span> <span>Arithmetical and astronomical</span> </div> </a> <ul id="toc-Arithmetical_and_astronomical-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Other_variants" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Other_variants"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2</span> <span>Other variants</span> </div> </a> <ul id="toc-Other_variants-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Usage" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Usage"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Usage</span> </div> </a> <button aria-controls="toc-Usage-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Usage subsection</span> </button> <ul id="toc-Usage-sublist" class="vector-toc-list"> <li id="toc-Gregorian" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Gregorian"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.1</span> <span>Gregorian</span> </div> </a> <ul id="toc-Gregorian-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Religious" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Religious"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.2</span> <span>Religious</span> </div> </a> <ul id="toc-Religious-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-National" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#National"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.3</span> <span>National</span> </div> </a> <ul id="toc-National-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Fiscal" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Fiscal"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.4</span> <span>Fiscal</span> </div> </a> <ul id="toc-Fiscal-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Formats" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Formats"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Formats</span> </div> </a> <ul id="toc-Formats-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Software" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Software"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Software</span> </div> </a> <ul id="toc-Software-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>References</span> </div> </a> <button aria-controls="toc-References-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle References subsection</span> </button> <ul id="toc-References-sublist" class="vector-toc-list"> <li id="toc-Citations" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Citations"> <div class="vector-toc-text"> <span class="vector-toc-numb">10.1</span> <span>Citations</span> </div> </a> <ul id="toc-Citations-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Sources" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Sources"> <div class="vector-toc-text"> <span class="vector-toc-numb">10.2</span> <span>Sources</span> </div> </a> <ul id="toc-Sources-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Further_reading" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Further_reading"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>Further reading</span> </div> </a> <ul id="toc-Further_reading-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">12</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Calendar</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 182 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-182" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">182 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-kbd mw-list-item"><a href="https://kbd.wikipedia.org/wiki/%D0%9C%D0%B0%D1%85%D1%83%D1%8D_%D0%93%D1%8A%D1%8D%D0%BF%D1%81_(%D0%9C%D0%B0%D0%B7%D1%8D%D1%85%D1%8D%D1%80)" title="Махуэ Гъэпс (Мазэхэр) – Kabardian" lang="kbd" hreflang="kbd" data-title="Махуэ Гъэпс (Мазэхэр)" data-language-autonym="Адыгэбзэ" data-language-local-name="Kabardian" class="interlanguage-link-target"><span>Адыгэбзэ</span></a></li><li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Kalender" title="Kalender – Afrikaans" lang="af" hreflang="af" data-title="Kalender" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Kalender" title="Kalender – Alemannic" lang="gsw" hreflang="gsw" data-title="Kalender" data-language-autonym="Alemannisch" data-language-local-name="Alemannic" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/%E1%8B%A8%E1%89%80%E1%8A%95_%E1%88%98%E1%89%81%E1%8C%A0%E1%88%AA%E1%8B%AB" title="የቀን መቁጠሪያ – Amharic" lang="am" hreflang="am" data-title="የቀን መቁጠሪያ" data-language-autonym="አማርኛ" data-language-local-name="Amharic" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-ang mw-list-item"><a href="https://ang.wikipedia.org/wiki/Ger%C4%ABmb%C5%8Dc" title="Gerīmbōc – Old English" lang="ang" hreflang="ang" data-title="Gerīmbōc" data-language-autonym="Ænglisc" data-language-local-name="Old English" class="interlanguage-link-target"><span>Ænglisc</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D9%82%D9%88%D9%8A%D9%85" title="تقويم – Arabic" lang="ar" hreflang="ar" data-title="تقويم" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Calandario" title="Calandario – Aragonese" lang="an" hreflang="an" data-title="Calandario" data-language-autonym="Aragonés" data-language-local-name="Aragonese" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-arc mw-list-item"><a href="https://arc.wikipedia.org/wiki/%DC%A3%DC%98%DC%AA%DC%93%DC%95%DC%90" title="ܣܘܪܓܕܐ – Aramaic" lang="arc" hreflang="arc" data-title="ܣܘܪܓܕܐ" data-language-autonym="ܐܪܡܝܐ" data-language-local-name="Aramaic" class="interlanguage-link-target"><span>ܐܪܡܝܐ</span></a></li><li class="interlanguage-link interwiki-as mw-list-item"><a href="https://as.wikipedia.org/wiki/%E0%A6%A6%E0%A6%BF%E0%A6%A8%E0%A6%AA%E0%A6%9E%E0%A7%8D%E0%A6%9C%E0%A7%80" title="দিনপঞ্জী – Assamese" lang="as" hreflang="as" data-title="দিনপঞ্জী" data-language-autonym="অসমীয়া" data-language-local-name="Assamese" class="interlanguage-link-target"><span>অসমীয়া</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Calendariu" title="Calendariu – Asturian" lang="ast" hreflang="ast" data-title="Calendariu" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-awa mw-list-item"><a href="https://awa.wikipedia.org/wiki/%E0%A4%95%E0%A5%88%E0%A4%B2%E0%A5%87%E0%A4%A3%E0%A5%8D%E0%A4%A1%E0%A4%B0" title="कैलेण्डर – Awadhi" lang="awa" hreflang="awa" data-title="कैलेण्डर" data-language-autonym="अवधी" data-language-local-name="Awadhi" class="interlanguage-link-target"><span>अवधी</span></a></li><li class="interlanguage-link interwiki-gn mw-list-item"><a href="https://gn.wikipedia.org/wiki/Arapapaha" title="Arapapaha – Guarani" lang="gn" hreflang="gn" data-title="Arapapaha" data-language-autonym="Avañe&#039;ẽ" data-language-local-name="Guarani" class="interlanguage-link-target"><span>Avañe'ẽ</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/T%C9%99qvim" title="Təqvim – Azerbaijani" lang="az" hreflang="az" data-title="Təqvim" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D8%AA%D9%82%D9%88%DB%8C%D9%85" title="تقویم – South Azerbaijani" lang="azb" hreflang="azb" data-title="تقویم" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AC%E0%A6%B0%E0%A7%8D%E0%A6%B7%E0%A6%AA%E0%A6%9E%E0%A7%8D%E0%A6%9C%E0%A6%BF" title="বর্ষপঞ্জি – Bangla" lang="bn" hreflang="bn" data-title="বর্ষপঞ্জি" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Le%CC%8Dk-hoat" title="Le̍k-hoat – Minnan" lang="nan" hreflang="nan" data-title="Le̍k-hoat" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D0%B5%D0%BD%D0%B4%D0%B0%D1%80%D1%8C" title="Календарь – Bashkir" lang="ba" hreflang="ba" data-title="Календарь" data-language-autonym="Башҡортса" data-language-local-name="Bashkir" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D1%8F%D0%BD%D0%B4%D0%B0%D1%80" title="Каляндар – Belarusian" lang="be" hreflang="be" data-title="Каляндар" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D1%8F%D0%BD%D0%B4%D0%B0%D1%80" title="Каляндар – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Каляндар" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bh mw-list-item"><a href="https://bh.wikipedia.org/wiki/%E0%A4%95%E0%A5%88%E0%A4%B2%E0%A5%87%E0%A4%82%E0%A4%A1%E0%A4%B0" title="कैलेंडर – Bhojpuri" lang="bh" hreflang="bh" data-title="कैलेंडर" data-language-autonym="भोजपुरी" data-language-local-name="Bhojpuri" class="interlanguage-link-target"><span>भोजपुरी</span></a></li><li class="interlanguage-link interwiki-bcl mw-list-item"><a href="https://bcl.wikipedia.org/wiki/Kalendaryo" title="Kalendaryo – Central Bikol" lang="bcl" hreflang="bcl" data-title="Kalendaryo" data-language-autonym="Bikol Central" data-language-local-name="Central Bikol" class="interlanguage-link-target"><span>Bikol Central</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D0%B5%D0%BD%D0%B4%D0%B0%D1%80" title="Календар – Bulgarian" lang="bg" hreflang="bg" data-title="Календар" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/Kalenda" title="Kalenda – Bavarian" lang="bar" hreflang="bar" data-title="Kalenda" data-language-autonym="Boarisch" data-language-local-name="Bavarian" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Kalendar" title="Kalendar – Bosnian" lang="bs" hreflang="bs" data-title="Kalendar" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Deiziadur" title="Deiziadur – Breton" lang="br" hreflang="br" data-title="Deiziadur" data-language-autonym="Brezhoneg" data-language-local-name="Breton" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-bxr mw-list-item"><a href="https://bxr.wikipedia.org/wiki/%D0%9B%D0%B8%D1%82%D1%8D" title="Литэ – Russia Buriat" lang="bxr" hreflang="bxr" data-title="Литэ" data-language-autonym="Буряад" data-language-local-name="Russia Buriat" class="interlanguage-link-target"><span>Буряад</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Calendari" title="Calendari – Catalan" lang="ca" hreflang="ca" data-title="Calendari" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D0%B5%D0%BD%D0%B4%D0%B0%D1%80%D1%8C" title="Календарь – Chuvash" lang="cv" hreflang="cv" data-title="Календарь" data-language-autonym="Чӑвашла" data-language-local-name="Chuvash" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-ceb mw-list-item"><a href="https://ceb.wikipedia.org/wiki/Kalendaryo" title="Kalendaryo – Cebuano" lang="ceb" hreflang="ceb" data-title="Kalendaryo" data-language-autonym="Cebuano" data-language-local-name="Cebuano" class="interlanguage-link-target"><span>Cebuano</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Kalend%C3%A1%C5%99" title="Kalendář – Czech" lang="cs" hreflang="cs" data-title="Kalendář" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-ch mw-list-item"><a href="https://ch.wikipedia.org/wiki/Kalendario" title="Kalendario – Chamorro" lang="ch" hreflang="ch" data-title="Kalendario" data-language-autonym="Chamoru" data-language-local-name="Chamorro" class="interlanguage-link-target"><span>Chamoru</span></a></li><li class="interlanguage-link interwiki-cbk-zam mw-list-item"><a href="https://cbk-zam.wikipedia.org/wiki/Calendario" title="Calendario – Chavacano" lang="cbk" hreflang="cbk" data-title="Calendario" data-language-autonym="Chavacano de Zamboanga" data-language-local-name="Chavacano" class="interlanguage-link-target"><span>Chavacano de Zamboanga</span></a></li><li class="interlanguage-link interwiki-sn mw-list-item"><a href="https://sn.wikipedia.org/wiki/Karenda" title="Karenda – Shona" lang="sn" hreflang="sn" data-title="Karenda" data-language-autonym="ChiShona" data-language-local-name="Shona" class="interlanguage-link-target"><span>ChiShona</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Calendr" title="Calendr – Welsh" lang="cy" hreflang="cy" data-title="Calendr" data-language-autonym="Cymraeg" data-language-local-name="Welsh" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Kalender" title="Kalender – Danish" lang="da" hreflang="da" data-title="Kalender" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D8%AA%D9%82%D9%88%D9%8A%D9%85" title="تقويم – Moroccan Arabic" lang="ary" hreflang="ary" data-title="تقويم" data-language-autonym="الدارجة" data-language-local-name="Moroccan Arabic" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Kalender" title="Kalender – German" lang="de" hreflang="de" data-title="Kalender" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Kalender" title="Kalender – Estonian" lang="et" hreflang="et" data-title="Kalender" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%97%CE%BC%CE%B5%CF%81%CE%BF%CE%BB%CF%8C%CE%B3%CE%B9%CE%BF" title="Ημερολόγιο – Greek" lang="el" hreflang="el" data-title="Ημερολόγιο" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/Lun%C3%A8ri" title="Lunèri – Emiliano-Romagnolo" lang="egl" hreflang="egl" data-title="Lunèri" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="Emiliano-Romagnolo" class="interlanguage-link-target"><span>Emiliàn e rumagnòl</span></a></li><li class="interlanguage-link interwiki-myv mw-list-item"><a href="https://myv.wikipedia.org/wiki/%D0%9A%D0%BE%D0%B2%D0%BA%D0%B5%D1%80%D1%8C%D0%BA%D1%81" title="Ковкерькс – Erzya" lang="myv" hreflang="myv" data-title="Ковкерькс" data-language-autonym="Эрзянь" data-language-local-name="Erzya" class="interlanguage-link-target"><span>Эрзянь</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Calendario" title="Calendario – Spanish" lang="es" hreflang="es" data-title="Calendario" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Kalendaro" title="Kalendaro – Esperanto" lang="eo" hreflang="eo" data-title="Kalendaro" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-ext mw-list-item"><a href="https://ext.wikipedia.org/wiki/Caland%C3%A1riu" title="Calandáriu – Extremaduran" lang="ext" hreflang="ext" data-title="Calandáriu" data-language-autonym="Estremeñu" data-language-local-name="Extremaduran" class="interlanguage-link-target"><span>Estremeñu</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Egutegi" title="Egutegi – Basque" lang="eu" hreflang="eu" data-title="Egutegi" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%DA%AF%D8%A7%D9%87%E2%80%8C%D8%B4%D9%85%D8%A7%D8%B1%DB%8C" title="گاه‌شماری – Persian" lang="fa" hreflang="fa" data-title="گاه‌شماری" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-hif mw-list-item"><a href="https://hif.wikipedia.org/wiki/Calendar" title="Calendar – Fiji Hindi" lang="hif" hreflang="hif" data-title="Calendar" data-language-autonym="Fiji Hindi" data-language-local-name="Fiji Hindi" class="interlanguage-link-target"><span>Fiji Hindi</span></a></li><li class="interlanguage-link interwiki-fo mw-list-item"><a href="https://fo.wikipedia.org/wiki/Kalendari" title="Kalendari – Faroese" lang="fo" hreflang="fo" data-title="Kalendari" data-language-autonym="Føroyskt" data-language-local-name="Faroese" class="interlanguage-link-target"><span>Føroyskt</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Calendrier" title="Calendrier – French" lang="fr" hreflang="fr" data-title="Calendrier" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Kalinder" title="Kalinder – Western Frisian" lang="fy" hreflang="fy" data-title="Kalinder" data-language-autonym="Frysk" data-language-local-name="Western Frisian" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-fur mw-list-item"><a href="https://fur.wikipedia.org/wiki/Calendari" title="Calendari – Friulian" lang="fur" hreflang="fur" data-title="Calendari" data-language-autonym="Furlan" data-language-local-name="Friulian" class="interlanguage-link-target"><span>Furlan</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Calendario" title="Calendario – Galician" lang="gl" hreflang="gl" data-title="Calendario" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gan mw-list-item"><a href="https://gan.wikipedia.org/wiki/%E6%9B%86%E6%B3%95" title="曆法 – Gan" lang="gan" hreflang="gan" data-title="曆法" data-language-autonym="贛語" data-language-local-name="Gan" class="interlanguage-link-target"><span>贛語</span></a></li><li class="interlanguage-link interwiki-hak mw-list-item"><a href="https://hak.wikipedia.org/wiki/La%CC%8Dk-fap" title="La̍k-fap – Hakka Chinese" lang="hak" hreflang="hak" data-title="La̍k-fap" data-language-autonym="客家語 / Hak-kâ-ngî" data-language-local-name="Hakka Chinese" class="interlanguage-link-target"><span>客家語 / Hak-kâ-ngî</span></a></li><li class="interlanguage-link interwiki-xal mw-list-item"><a href="https://xal.wikipedia.org/wiki/%D0%9B%D0%B8%D1%82" title="Лит – Kalmyk" lang="xal" hreflang="xal" data-title="Лит" data-language-autonym="Хальмг" data-language-local-name="Kalmyk" class="interlanguage-link-target"><span>Хальмг</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%97%AD%EB%B2%95" title="역법 – Korean" lang="ko" hreflang="ko" data-title="역법" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ha mw-list-item"><a href="https://ha.wikipedia.org/wiki/Kalanda" title="Kalanda – Hausa" lang="ha" hreflang="ha" data-title="Kalanda" data-language-autonym="Hausa" data-language-local-name="Hausa" class="interlanguage-link-target"><span>Hausa</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%95%D6%80%D5%A1%D6%81%D5%B8%D6%82%D5%B5%D6%81" title="Օրացույց – Armenian" lang="hy" hreflang="hy" data-title="Օրացույց" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%95%E0%A4%BE%E0%A4%B2%E0%A4%A6%E0%A4%B0%E0%A5%8D%E0%A4%B6%E0%A4%95" title="कालदर्शक – Hindi" lang="hi" hreflang="hi" data-title="कालदर्शक" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Kalendar" title="Kalendar – Croatian" lang="hr" hreflang="hr" data-title="Kalendar" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-gor mw-list-item"><a href="https://gor.wikipedia.org/wiki/Almanak" title="Almanak – Gorontalo" lang="gor" hreflang="gor" data-title="Almanak" data-language-autonym="Bahasa Hulontalo" data-language-local-name="Gorontalo" class="interlanguage-link-target"><span>Bahasa Hulontalo</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Kalendario" title="Kalendario – Ido" lang="io" hreflang="io" data-title="Kalendario" data-language-autonym="Ido" data-language-local-name="Ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-ilo mw-list-item"><a href="https://ilo.wikipedia.org/wiki/Kalendario" title="Kalendario – Iloko" lang="ilo" hreflang="ilo" data-title="Kalendario" data-language-autonym="Ilokano" data-language-local-name="Iloko" class="interlanguage-link-target"><span>Ilokano</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Kalender" title="Kalender – Indonesian" lang="id" hreflang="id" data-title="Kalender" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Calendario" title="Calendario – Interlingua" lang="ia" hreflang="ia" data-title="Calendario" data-language-autonym="Interlingua" data-language-local-name="Interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-zu mw-list-item"><a href="https://zu.wikipedia.org/wiki/Isibalizinsuku" title="Isibalizinsuku – Zulu" lang="zu" hreflang="zu" data-title="Isibalizinsuku" data-language-autonym="IsiZulu" data-language-local-name="Zulu" class="interlanguage-link-target"><span>IsiZulu</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Dagatal" title="Dagatal – Icelandic" lang="is" hreflang="is" data-title="Dagatal" data-language-autonym="Íslenska" data-language-local-name="Icelandic" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Calendario" title="Calendario – Italian" lang="it" hreflang="it" data-title="Calendario" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9C%D7%95%D7%97_%D7%A9%D7%A0%D7%94" title="לוח שנה – Hebrew" lang="he" hreflang="he" data-title="לוח שנה" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/Pananggalan" title="Pananggalan – Javanese" lang="jv" hreflang="jv" data-title="Pananggalan" data-language-autonym="Jawa" data-language-local-name="Javanese" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-kbp mw-list-item"><a href="https://kbp.wikipedia.org/wiki/Fenas%C9%A9_takaya%C9%A3" title="Fenasɩ takayaɣ – Kabiye" lang="kbp" hreflang="kbp" data-title="Fenasɩ takayaɣ" data-language-autonym="Kabɩyɛ" data-language-local-name="Kabiye" class="interlanguage-link-target"><span>Kabɩyɛ</span></a></li><li class="interlanguage-link interwiki-kl mw-list-item"><a href="https://kl.wikipedia.org/wiki/Ullorsiut" title="Ullorsiut – Kalaallisut" lang="kl" hreflang="kl" data-title="Ullorsiut" data-language-autonym="Kalaallisut" data-language-local-name="Kalaallisut" class="interlanguage-link-target"><span>Kalaallisut</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%AA%E0%B2%82%E0%B2%9A%E0%B2%BE%E0%B2%82%E0%B2%97" title="ಪಂಚಾಂಗ – Kannada" lang="kn" hreflang="kn" data-title="ಪಂಚಾಂಗ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="Kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-krc mw-list-item"><a href="https://krc.wikipedia.org/wiki/%D0%9E%D1%80%D1%83%D0%B7%D0%BB%D0%B0%D0%BC%D0%B0" title="Орузлама – Karachay-Balkar" lang="krc" hreflang="krc" data-title="Орузлама" data-language-autonym="Къарачай-малкъар" data-language-local-name="Karachay-Balkar" class="interlanguage-link-target"><span>Къарачай-малкъар</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%99%E1%83%90%E1%83%9A%E1%83%94%E1%83%9C%E1%83%93%E1%83%90%E1%83%A0%E1%83%98" title="კალენდარი – Georgian" lang="ka" hreflang="ka" data-title="კალენდარი" data-language-autonym="ქართული" data-language-local-name="Georgian" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9A%D2%AF%D0%BD%D1%82%D1%96%D0%B7%D0%B1%D0%B5" title="Күнтізбе – Kazakh" lang="kk" hreflang="kk" data-title="Күнтізбе" data-language-autonym="Қазақша" data-language-local-name="Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-kw mw-list-item"><a href="https://kw.wikipedia.org/wiki/Kalender" title="Kalender – Cornish" lang="kw" hreflang="kw" data-title="Kalender" data-language-autonym="Kernowek" data-language-local-name="Cornish" class="interlanguage-link-target"><span>Kernowek</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Kalenda" title="Kalenda – Swahili" lang="sw" hreflang="sw" data-title="Kalenda" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Almanak" title="Almanak – Haitian Creole" lang="ht" hreflang="ht" data-title="Almanak" data-language-autonym="Kreyòl ayisyen" data-language-local-name="Haitian Creole" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-gcr mw-list-item"><a href="https://gcr.wikipedia.org/wiki/Kalandriy%C3%A9" title="Kalandriyé – Guianan Creole" lang="gcr" hreflang="gcr" data-title="Kalandriyé" data-language-autonym="Kriyòl gwiyannen" data-language-local-name="Guianan Creole" class="interlanguage-link-target"><span>Kriyòl gwiyannen</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Salname" title="Salname – Kurdish" lang="ku" hreflang="ku" data-title="Salname" data-language-autonym="Kurdî" data-language-local-name="Kurdish" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%96%D1%8B%D0%BB%D0%BD%D0%B0%D0%B0%D0%BC%D0%B0" title="Жылнаама – Kyrgyz" lang="ky" hreflang="ky" data-title="Жылнаама" data-language-autonym="Кыргызча" data-language-local-name="Kyrgyz" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-lld mw-list-item"><a href="https://lld.wikipedia.org/wiki/Calender" title="Calender – Ladin" lang="lld" hreflang="lld" data-title="Calender" data-language-autonym="Ladin" data-language-local-name="Ladin" class="interlanguage-link-target"><span>Ladin</span></a></li><li class="interlanguage-link interwiki-lbe mw-list-item"><a href="https://lbe.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D0%B5%D0%BD%D0%B4%D0%B0%D1%80%D1%8C" title="Календарь – Lak" lang="lbe" hreflang="lbe" data-title="Календарь" data-language-autonym="Лакку" data-language-local-name="Lak" class="interlanguage-link-target"><span>Лакку</span></a></li><li class="interlanguage-link interwiki-lo mw-list-item"><a href="https://lo.wikipedia.org/wiki/%E0%BA%9B%E0%BA%B0%E0%BA%95%E0%BA%B4%E0%BA%97%E0%BA%B4%E0%BA%99" title="ປະຕິທິນ – Lao" lang="lo" hreflang="lo" data-title="ປະຕິທິນ" data-language-autonym="ລາວ" data-language-local-name="Lao" class="interlanguage-link-target"><span>ລາວ</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Calendarium" title="Calendarium – Latin" lang="la" hreflang="la" data-title="Calendarium" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Kalend%C4%81rs" title="Kalendārs – Latvian" lang="lv" hreflang="lv" data-title="Kalendārs" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Kalendorius" title="Kalendorius – Lithuanian" lang="lt" hreflang="lt" data-title="Kalendorius" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lij mw-list-item"><a href="https://lij.wikipedia.org/wiki/L%C3%BBn%C3%A4io" title="Lûnäio – Ligurian" lang="lij" hreflang="lij" data-title="Lûnäio" data-language-autonym="Ligure" data-language-local-name="Ligurian" class="interlanguage-link-target"><span>Ligure</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Klender" title="Klender – Limburgish" lang="li" hreflang="li" data-title="Klender" data-language-autonym="Limburgs" data-language-local-name="Limburgish" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-ln mw-list-item"><a href="https://ln.wikipedia.org/wiki/Man%C3%A1ka" title="Manáka – Lingala" lang="ln" hreflang="ln" data-title="Manáka" data-language-autonym="Lingála" data-language-local-name="Lingala" class="interlanguage-link-target"><span>Lingála</span></a></li><li class="interlanguage-link interwiki-lfn mw-list-item"><a href="https://lfn.wikipedia.org/wiki/Calendario" title="Calendario – Lingua Franca Nova" lang="lfn" hreflang="lfn" data-title="Calendario" data-language-autonym="Lingua Franca Nova" data-language-local-name="Lingua Franca Nova" class="interlanguage-link-target"><span>Lingua Franca Nova</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/L%C3%B6n%C3%A0re" title="Lönàre – Lombard" lang="lmo" hreflang="lmo" data-title="Lönàre" data-language-autonym="Lombard" data-language-local-name="Lombard" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Napt%C3%A1r" title="Naptár – Hungarian" lang="hu" hreflang="hu" data-title="Naptár" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D0%B5%D0%BD%D0%B4%D0%B0%D1%80" title="Календар – Macedonian" lang="mk" hreflang="mk" data-title="Календар" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Tetiandro" title="Tetiandro – Malagasy" lang="mg" hreflang="mg" data-title="Tetiandro" data-language-autonym="Malagasy" data-language-local-name="Malagasy" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%95%E0%B4%B2%E0%B4%A3%E0%B5%8D%E0%B4%9F%E0%B5%BC" title="കലണ്ടർ – Malayalam" lang="ml" hreflang="ml" data-title="കലണ്ടർ" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mi mw-list-item"><a href="https://mi.wikipedia.org/wiki/Maramataka" title="Maramataka – Māori" lang="mi" hreflang="mi" data-title="Maramataka" data-language-autonym="Māori" data-language-local-name="Māori" class="interlanguage-link-target"><span>Māori</span></a></li><li class="interlanguage-link interwiki-xmf mw-list-item"><a href="https://xmf.wikipedia.org/wiki/%E1%83%99%E1%83%90%E1%83%9A%E1%83%94%E1%83%9C%E1%83%93%E1%83%90%E1%83%A0%E1%83%98" title="კალენდარი – Mingrelian" lang="xmf" hreflang="xmf" data-title="კალენდარი" data-language-autonym="მარგალური" data-language-local-name="Mingrelian" class="interlanguage-link-target"><span>მარგალური</span></a></li><li class="interlanguage-link interwiki-mnw mw-list-item"><a href="https://mnw.wikipedia.org/wiki/%E1%80%80%E1%80%BC%E1%80%80%E1%80%B9%E1%80%80%E1%80%92%E1%80%AD%E1%80%94%E1%80%BA" title="ကြက္ကဒိန် – Mon" lang="mnw" hreflang="mnw" data-title="ကြက္ကဒိန်" data-language-autonym="ဘာသာမန်" data-language-local-name="Mon" class="interlanguage-link-target"><span>ဘာသာမန်</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Takwim" title="Takwim – Malay" lang="ms" hreflang="ms" data-title="Takwim" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-min mw-list-item"><a href="https://min.wikipedia.org/wiki/Almanak" title="Almanak – Minangkabau" lang="min" hreflang="min" data-title="Almanak" data-language-autonym="Minangkabau" data-language-local-name="Minangkabau" class="interlanguage-link-target"><span>Minangkabau</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/L%C4%ADk-hu%C3%A1k" title="Lĭk-huák – Mindong" lang="cdo" hreflang="cdo" data-title="Lĭk-huák" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-mdf mw-list-item"><a href="https://mdf.wikipedia.org/wiki/%D0%9A%D0%BE%D0%B2%D0%B3%D1%8F%D1%80%D1%8C%D0%BA%D1%81%D1%81%D1%8C" title="Ковгярькссь – Moksha" lang="mdf" hreflang="mdf" data-title="Ковгярькссь" data-language-autonym="Мокшень" data-language-local-name="Moksha" class="interlanguage-link-target"><span>Мокшень</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%A6%D0%B0%D0%B3%D0%B0%D0%BB%D0%B1%D0%B0%D1%80" title="Цагалбар – Mongolian" lang="mn" hreflang="mn" data-title="Цагалбар" data-language-autonym="Монгол" data-language-local-name="Mongolian" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%95%E1%80%BC%E1%80%80%E1%80%B9%E1%80%81%E1%80%92%E1%80%AD%E1%80%94%E1%80%BA" title="ပြက္ခဒိန် – Burmese" lang="my" hreflang="my" data-title="ပြက္ခဒိန်" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Burmese" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Kalender" title="Kalender – Dutch" lang="nl" hreflang="nl" data-title="Kalender" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%AA%E0%A4%BE%E0%A4%A4%E0%A5%8D%E0%A4%B0%E0%A5%8B" title="पात्रो – Nepali" lang="ne" hreflang="ne" data-title="पात्रो" data-language-autonym="नेपाली" data-language-local-name="Nepali" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-new mw-list-item"><a href="https://new.wikipedia.org/wiki/%E0%A4%A8%E0%A4%97%E0%A5%81%E0%A4%AE%E0%A4%BE%E0%A4%83" title="नगुमाः – Newari" lang="new" hreflang="new" data-title="नगुमाः" data-language-autonym="नेपाल भाषा" data-language-local-name="Newari" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%9A%A6" title="暦 – Japanese" lang="ja" hreflang="ja" data-title="暦" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ce mw-list-item"><a href="https://ce.wikipedia.org/wiki/%D0%A0%D1%83%D0%B7%D0%BC%D0%B0" title="Рузма – Chechen" lang="ce" hreflang="ce" data-title="Рузма" data-language-autonym="Нохчийн" data-language-local-name="Chechen" class="interlanguage-link-target"><span>Нохчийн</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Kalender" title="Kalender – Northern Frisian" lang="frr" hreflang="frr" data-title="Kalender" data-language-autonym="Nordfriisk" data-language-local-name="Northern Frisian" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Kalender" title="Kalender – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Kalender" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Kalender" title="Kalender – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Kalender" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-nrm mw-list-item"><a href="https://nrm.wikipedia.org/wiki/Calendri" title="Calendri – Norman" lang="nrf" hreflang="nrf" data-title="Calendri" data-language-autonym="Nouormand" data-language-local-name="Norman" class="interlanguage-link-target"><span>Nouormand</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Calendi%C3%A8r" title="Calendièr – Occitan" lang="oc" hreflang="oc" data-title="Calendièr" data-language-autonym="Occitan" data-language-local-name="Occitan" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-om mw-list-item"><a href="https://om.wikipedia.org/wiki/Dhaha" title="Dhaha – Oromo" lang="om" hreflang="om" data-title="Dhaha" data-language-autonym="Oromoo" data-language-local-name="Oromo" class="interlanguage-link-target"><span>Oromoo</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Taqvim" title="Taqvim – Uzbek" lang="uz" hreflang="uz" data-title="Taqvim" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%95%E0%A9%88%E0%A8%B2%E0%A9%B0%E0%A8%A1%E0%A8%B0" title="ਕੈਲੰਡਰ – Punjabi" lang="pa" hreflang="pa" data-title="ਕੈਲੰਡਰ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Punjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%DA%A9%DB%8C%D9%84%D9%86%DA%88%D8%B1" title="کیلنڈر – Western Punjabi" lang="pnb" hreflang="pnb" data-title="کیلنڈر" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%DA%A9%D9%84%D9%8A%D8%B2" title="کليز – Pashto" lang="ps" hreflang="ps" data-title="کليز" data-language-autonym="پښتو" data-language-local-name="Pashto" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-jam mw-list-item"><a href="https://jam.wikipedia.org/wiki/Alminak" title="Alminak – Jamaican Creole English" lang="jam" hreflang="jam" data-title="Alminak" data-language-autonym="Patois" data-language-local-name="Jamaican Creole English" class="interlanguage-link-target"><span>Patois</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Klenner" title="Klenner – Low German" lang="nds" hreflang="nds" data-title="Klenner" data-language-autonym="Plattdüütsch" data-language-local-name="Low German" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Kalendarz" title="Kalendarz – Polish" lang="pl" hreflang="pl" data-title="Kalendarz" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Calend%C3%A1rio" title="Calendário – Portuguese" lang="pt" hreflang="pt" data-title="Calendário" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-kaa mw-list-item"><a href="https://kaa.wikipedia.org/wiki/Kalendar" title="Kalendar – Kara-Kalpak" lang="kaa" hreflang="kaa" data-title="Kalendar" data-language-autonym="Qaraqalpaqsha" data-language-local-name="Kara-Kalpak" class="interlanguage-link-target"><span>Qaraqalpaqsha</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Calendar" title="Calendar – Romanian" lang="ro" hreflang="ro" data-title="Calendar" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Kalintharyu" title="Kalintharyu – Quechua" lang="qu" hreflang="qu" data-title="Kalintharyu" data-language-autonym="Runa Simi" data-language-local-name="Quechua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-rue mw-list-item"><a href="https://rue.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D0%B5%D0%BD%D0%B4%D0%B0%D1%80%D1%8C" title="Календарь – Rusyn" lang="rue" hreflang="rue" data-title="Календарь" data-language-autonym="Русиньскый" data-language-local-name="Rusyn" class="interlanguage-link-target"><span>Русиньскый</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D0%B5%D0%BD%D0%B4%D0%B0%D1%80%D1%8C" title="Календарь – Russian" lang="ru" hreflang="ru" data-title="Календарь" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%A5%D0%B0%D0%BB%D0%B0%D0%BD%D0%B4%D0%B0%D0%B0%D1%80" title="Халандаар – Yakut" lang="sah" hreflang="sah" data-title="Халандаар" data-language-autonym="Саха тыла" data-language-local-name="Yakut" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sa mw-list-item"><a href="https://sa.wikipedia.org/wiki/%E0%A4%AA%E0%A4%9E%E0%A5%8D%E0%A4%9A%E0%A4%BE%E0%A4%99%E0%A5%8D%E0%A4%97%E0%A4%83" title="पञ्चाङ्गः – Sanskrit" lang="sa" hreflang="sa" data-title="पञ्चाङ्गः" data-language-autonym="संस्कृतम्" data-language-local-name="Sanskrit" class="interlanguage-link-target"><span>संस्कृतम्</span></a></li><li class="interlanguage-link interwiki-sc mw-list-item"><a href="https://sc.wikipedia.org/wiki/Calend%C3%A0riu" title="Calendàriu – Sardinian" lang="sc" hreflang="sc" data-title="Calendàriu" data-language-autonym="Sardu" data-language-local-name="Sardinian" class="interlanguage-link-target"><span>Sardu</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Calendar" title="Calendar – Scots" lang="sco" hreflang="sco" data-title="Calendar" data-language-autonym="Scots" data-language-local-name="Scots" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-nso mw-list-item"><a href="https://nso.wikipedia.org/wiki/T%C5%A1hupamabaka" title="Tšhupamabaka – Northern Sotho" lang="nso" hreflang="nso" data-title="Tšhupamabaka" data-language-autonym="Sesotho sa Leboa" data-language-local-name="Northern Sotho" class="interlanguage-link-target"><span>Sesotho sa Leboa</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Kalendari" title="Kalendari – Albanian" lang="sq" hreflang="sq" data-title="Kalendari" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Calannariu" title="Calannariu – Sicilian" lang="scn" hreflang="scn" data-title="Calannariu" data-language-autonym="Sicilianu" data-language-local-name="Sicilian" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%AF%E0%B7%92%E0%B6%B1_%E0%B6%AF%E0%B7%83%E0%B7%94%E0%B6%B1%E0%B7%8A" title="දින දසුන් – Sinhala" lang="si" hreflang="si" data-title="දින දසුන්" data-language-autonym="සිංහල" data-language-local-name="Sinhala" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Calendar" title="Calendar – Simple English" lang="en-simple" hreflang="en-simple" data-title="Calendar" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%DA%AA%D8%A6%D9%84%D9%8A%D9%86%DA%8A%D8%B1" title="ڪئلينڊر – Sindhi" lang="sd" hreflang="sd" data-title="ڪئلينڊر" data-language-autonym="سنڌي" data-language-local-name="Sindhi" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Kalend%C3%A1r" title="Kalendár – Slovak" lang="sk" hreflang="sk" data-title="Kalendár" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Koledar" title="Koledar – Slovenian" lang="sl" hreflang="sl" data-title="Koledar" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/Kalandar" title="Kalandar – Somali" lang="so" hreflang="so" data-title="Kalandar" data-language-autonym="Soomaaliga" data-language-local-name="Somali" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%DA%95%DB%86%DA%98%DA%98%D9%85%DB%8E%D8%B1" title="ڕۆژژمێر – Central Kurdish" lang="ckb" hreflang="ckb" data-title="ڕۆژژمێر" data-language-autonym="کوردی" data-language-local-name="Central Kurdish" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D0%B5%D0%BD%D0%B4%D0%B0%D1%80" title="Календар – Serbian" lang="sr" hreflang="sr" data-title="Календар" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Kalendar" title="Kalendar – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Kalendar" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Kal%C3%A9nder" title="Kalénder – Sundanese" lang="su" hreflang="su" data-title="Kalénder" data-language-autonym="Sunda" data-language-local-name="Sundanese" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Kalenteri" title="Kalenteri – Finnish" lang="fi" hreflang="fi" data-title="Kalenteri" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Kalender" title="Kalender – Swedish" lang="sv" hreflang="sv" data-title="Kalender" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Kalendaryo" title="Kalendaryo – Tagalog" lang="tl" hreflang="tl" data-title="Kalendaryo" data-language-autonym="Tagalog" data-language-local-name="Tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%A8%E0%AE%BE%E0%AE%9F%E0%AF%8D%E0%AE%95%E0%AE%BE%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AE%BF" title="நாட்காட்டி – Tamil" lang="ta" hreflang="ta" data-title="நாட்காட்டி" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-shi mw-list-item"><a href="https://shi.wikipedia.org/wiki/Asmlussan" title="Asmlussan – Tachelhit" lang="shi" hreflang="shi" data-title="Asmlussan" data-language-autonym="Taclḥit" data-language-local-name="Tachelhit" class="interlanguage-link-target"><span>Taclḥit</span></a></li><li class="interlanguage-link interwiki-kab mw-list-item"><a href="https://kab.wikipedia.org/wiki/Taswast" title="Taswast – Kabyle" lang="kab" hreflang="kab" data-title="Taswast" data-language-autonym="Taqbaylit" data-language-local-name="Kabyle" class="interlanguage-link-target"><span>Taqbaylit</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%A2%D3%99%D0%BA%D1%8A%D0%B2%D0%B8%D0%BC" title="Тәкъвим – Tatar" lang="tt" hreflang="tt" data-title="Тәкъвим" data-language-autonym="Татарча / tatarça" data-language-local-name="Tatar" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%95%E0%B1%87%E0%B0%B2%E0%B0%82%E0%B0%A1%E0%B0%B0%E0%B1%81" title="కేలండరు – Telugu" lang="te" hreflang="te" data-title="కేలండరు" data-language-autonym="తెలుగు" data-language-local-name="Telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%9B%E0%B8%8F%E0%B8%B4%E0%B8%97%E0%B8%B4%E0%B8%99" title="ปฏิทิน – Thai" lang="th" hreflang="th" data-title="ปฏิทิน" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%A2%D0%B0%D2%9B%D0%B2%D0%B8%D0%BC" title="Тақвим – Tajik" lang="tg" hreflang="tg" data-title="Тақвим" data-language-autonym="Тоҷикӣ" data-language-local-name="Tajik" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-chr mw-list-item"><a href="https://chr.wikipedia.org/wiki/%E1%8F%85%E1%8F%99_%E1%8F%97%E1%8F%8E%E1%8F%97" title="ᏅᏙ ᏗᏎᏗ – Cherokee" lang="chr" hreflang="chr" data-title="ᏅᏙ ᏗᏎᏗ" data-language-autonym="ᏣᎳᎩ" data-language-local-name="Cherokee" class="interlanguage-link-target"><span>ᏣᎳᎩ</span></a></li><li class="interlanguage-link interwiki-chy mw-list-item"><a href="https://chy.wikipedia.org/wiki/Ho%C3%A9stone%C3%A9%C5%A1e%27he" title="Hoéstoneéše&#039;he – Cheyenne" lang="chy" hreflang="chy" data-title="Hoéstoneéše&#039;he" data-language-autonym="Tsetsêhestâhese" data-language-local-name="Cheyenne" class="interlanguage-link-target"><span>Tsetsêhestâhese</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Takvim" title="Takvim – Turkish" lang="tr" hreflang="tr" data-title="Takvim" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tyv mw-list-item"><a href="https://tyv.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D0%B5%D0%BD%D0%B4%D0%B0%D1%80%D1%8C" title="Календарь – Tuvinian" lang="tyv" hreflang="tyv" data-title="Календарь" data-language-autonym="Тыва дыл" data-language-local-name="Tuvinian" class="interlanguage-link-target"><span>Тыва дыл</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9A%D0%B0%D0%BB%D0%B5%D0%BD%D0%B4%D0%B0%D1%80" title="Календар – Ukrainian" lang="uk" hreflang="uk" data-title="Календар" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%AA%D9%82%D9%88%DB%8C%D9%85" title="تقویم – Urdu" lang="ur" hreflang="ur" data-title="تقویم" data-language-autonym="اردو" data-language-local-name="Urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-za mw-list-item"><a href="https://za.wikipedia.org/wiki/Ligfap" title="Ligfap – Zhuang" lang="za" hreflang="za" data-title="Ligfap" data-language-autonym="Vahcuengh" data-language-local-name="Zhuang" class="interlanguage-link-target"><span>Vahcuengh</span></a></li><li class="interlanguage-link interwiki-vep mw-list-item"><a href="https://vep.wikipedia.org/wiki/Kalendar%27" title="Kalendar&#039; – Veps" lang="vep" hreflang="vep" data-title="Kalendar&#039;" data-language-autonym="Vepsän kel’" data-language-local-name="Veps" class="interlanguage-link-target"><span>Vepsän kel’</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/L%E1%BB%8Bch" title="Lịch – Vietnamese" lang="vi" hreflang="vi" data-title="Lịch" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-vo mw-list-item"><a href="https://vo.wikipedia.org/wiki/Kaled" title="Kaled – Volapük" lang="vo" hreflang="vo" data-title="Kaled" data-language-autonym="Volapük" data-language-local-name="Volapük" class="interlanguage-link-target"><span>Volapük</span></a></li><li class="interlanguage-link interwiki-fiu-vro mw-list-item"><a href="https://fiu-vro.wikipedia.org/wiki/Kallendri" title="Kallendri – Võro" lang="vro" hreflang="vro" data-title="Kallendri" data-language-autonym="Võro" data-language-local-name="Võro" class="interlanguage-link-target"><span>Võro</span></a></li><li class="interlanguage-link interwiki-wa mw-list-item"><a href="https://wa.wikipedia.org/wiki/Calindr%C3%AE" title="Calindrî – Walloon" lang="wa" hreflang="wa" data-title="Calindrî" data-language-autonym="Walon" data-language-local-name="Walloon" class="interlanguage-link-target"><span>Walon</span></a></li><li class="interlanguage-link interwiki-zh-classical mw-list-item"><a href="https://zh-classical.wikipedia.org/wiki/%E6%9B%86" title="曆 – Literary Chinese" lang="lzh" hreflang="lzh" data-title="曆" data-language-autonym="文言" data-language-local-name="Literary Chinese" class="interlanguage-link-target"><span>文言</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Kalendaryo" title="Kalendaryo – Waray" lang="war" hreflang="war" data-title="Kalendaryo" data-language-autonym="Winaray" data-language-local-name="Waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wo mw-list-item"><a href="https://wo.wikipedia.org/wiki/Arminaat" title="Arminaat – Wolof" lang="wo" hreflang="wo" data-title="Arminaat" data-language-autonym="Wolof" data-language-local-name="Wolof" class="interlanguage-link-target"><span>Wolof</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E5%8E%86%E6%B3%95" title="历法 – Wu" lang="wuu" hreflang="wuu" data-title="历法" data-language-autonym="吴语" data-language-local-name="Wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%A7%D7%90%D7%9C%D7%A2%D7%A0%D7%93%D7%90%D7%A8" title="קאלענדאר – Yiddish" lang="yi" hreflang="yi" data-title="קאלענדאר" data-language-autonym="ייִדיש" data-language-local-name="Yiddish" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E6%9B%86" title="曆 – Cantonese" lang="yue" hreflang="yue" data-title="曆" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-diq mw-list-item"><a href="https://diq.wikipedia.org/wiki/Serrename" title="Serrename – Zazaki" lang="diq" hreflang="diq" data-title="Serrename" data-language-autonym="Zazaki" data-language-local-name="Zazaki" class="interlanguage-link-target"><span>Zazaki</span></a></li><li class="interlanguage-link interwiki-zea mw-list-item"><a href="https://zea.wikipedia.org/wiki/Kalender" title="Kalender – Zeelandic" lang="zea" hreflang="zea" data-title="Kalender" data-language-autonym="Zeêuws" data-language-local-name="Zeelandic" class="interlanguage-link-target"><span>Zeêuws</span></a></li><li class="interlanguage-link interwiki-bat-smg mw-list-item"><a href="https://bat-smg.wikipedia.org/wiki/Kal%C4%97nduorios" title="Kalėnduorios – Samogitian" lang="sgs" hreflang="sgs" data-title="Kalėnduorios" data-language-autonym="Žemaitėška" data-language-local-name="Samogitian" class="interlanguage-link-target"><span>Žemaitėška</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%8E%86%E6%B3%95" title="历法 – Chinese" lang="zh" hreflang="zh" data-title="历法" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-ann mw-list-item"><a href="https://ann.wikipedia.org/wiki/%C3%92fuk-acha" title="Òfuk-acha – Obolo" lang="ann" hreflang="ann" data-title="Òfuk-acha" data-language-autonym="Obolo" data-language-local-name="Obolo" class="interlanguage-link-target"><span>Obolo</span></a></li><li class="interlanguage-link interwiki-bew mw-list-item"><a href="https://bew.wikipedia.org/wiki/Almenak" title="Almenak – Betawi" lang="bew" hreflang="bew" data-title="Almenak" data-language-autonym="Betawi" data-language-local-name="Betawi" class="interlanguage-link-target"><span>Betawi</span></a></li><li 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linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages" title="A list of all special pages [q]" accesskey="q"><span>Special pages</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Calendar&amp;oldid=1258355089" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Calendar&amp;action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:CiteThisPage&amp;page=Calendar&amp;id=1258355089&amp;wpFormIdentifier=titleform" title="Information on how to cite this page"><span>Cite this page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&amp;url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FCalendar"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&amp;url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FCalendar"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&amp;page=Calendar&amp;action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Calendar&amp;printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Calendar" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q12132" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div 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data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">System for organizing the days of year</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">This article is about the dating system. For the physical object, see <a href="/wiki/Calendar_(stationery)" title="Calendar (stationery)">Calendar (stationery)</a>. For other uses, see <a href="/wiki/Calendar_(disambiguation)" class="mw-disambig" title="Calendar (disambiguation)">Calendar (disambiguation)</a>.</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">"📅" redirects here. For the unofficial holiday commonly represented by this emoji, see <a href="/wiki/World_Emoji_Day" title="World Emoji Day">World Emoji Day</a>.</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Not to be confused with <a href="/wiki/Calender" title="Calender">Calender</a>.</div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-Globalize plainlinks metadata ambox ambox-content ambox-globalize" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><span><img alt="Globe icon." src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Ambox_globe_content.svg/48px-Ambox_globe_content.svg.png" decoding="async" width="48" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Ambox_globe_content.svg/73px-Ambox_globe_content.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Ambox_globe_content.svg/97px-Ambox_globe_content.svg.png 2x" data-file-width="350" data-file-height="290" /></span></span></div></td><td class="mbox-text"><div class="mbox-text-span">The examples and perspective in this article <b>deal primarily with Eurasia and the Near East and do not represent a <a href="/wiki/Wikipedia:WikiProject_Countering_systemic_bias" title="Wikipedia:WikiProject Countering systemic bias">worldwide view</a> of the subject</b>.<span class="hide-when-compact"> You may <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Calendar&amp;action=edit">improve this article</a>, discuss the issue on the <a href="/wiki/Talk:Calendar#Systemic_bias_towards_Eurasian_calendars" title="Talk:Calendar">talk page</a>, or <a href="/wiki/Wikipedia:Article_wizard" title="Wikipedia:Article wizard">create a new article</a>, as appropriate.</span> <span class="date-container"><i>(<span class="date">September 2022</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <p> <style data-mw-deduplicate="TemplateStyles:r1256396092">.mw-parser-output .calendar-purple{color:var(--color-base,#202122);background-color:#ccf}.mw-parser-output .calendar-lightpurple{color:var(--color-base,#202122);background-color:#d8e0ff}html.skin-theme-clientpref-night .mw-parser-output .calendar-purple{background-color:#2a2a5c}html.skin-theme-clientpref-night .mw-parser-output .calendar-lightpurple{background-color:#202040}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .calendar-purple{background-color:#2a2a5c}html.skin-theme-clientpref-night .mw-parser-output .calendar-lightpurple{background-color:#202040}}</style> </p> <table class="toccolours floatright" style="text-align:center;" cellpadding="2" cellspacing="0"> <tbody><tr class="calendar-purple" style=""> <td> </td> <th colspan="5" style="text-align: center;"><a href="/wiki/November" title="November">November</a> </th> <td> </td></tr> <tr class="calendar-purple" style="border: none;"> <th scope="col" width="*" title="Sunday">Su </th> <th scope="col" width="*" title="Monday">Mo </th> <th scope="col" width="*" title="Tuesday">Tu </th> <th scope="col" width="*" title="Wednesday">We </th> <th scope="col" width="*" title="Thursday">Th </th> <th scope="col" width="*" title="Friday">Fr </th> <th scope="col" width="*" title="Saturday">Sa </th></tr> <tr> <td></td> <td></td> <td></td> <td></td> <td></td> <td><a href="/wiki/November_1" title="November 1"><span style="visibility:hidden;color:transparent;">0</span>1</a></td> <td><a href="/wiki/November_2" title="November 2"><span style="visibility:hidden;color:transparent;">0</span>2</a> </td></tr> <tr> <td><a href="/wiki/November_3" title="November 3"><span style="visibility:hidden;color:transparent;">0</span>3</a></td> <td><a href="/wiki/November_4" title="November 4"><span style="visibility:hidden;color:transparent;">0</span>4</a></td> <td><a href="/wiki/November_5" title="November 5"><span style="visibility:hidden;color:transparent;">0</span>5</a></td> <td><a href="/wiki/November_6" title="November 6"><span style="visibility:hidden;color:transparent;">0</span>6</a></td> <td><a href="/wiki/November_7" title="November 7"><span style="visibility:hidden;color:transparent;">0</span>7</a></td> <td><a href="/wiki/November_8" title="November 8"><span style="visibility:hidden;color:transparent;">0</span>8</a></td> <td><a href="/wiki/November_9" title="November 9"><span style="visibility:hidden;color:transparent;">0</span>9</a> </td></tr> <tr> <td><a href="/wiki/November_10" title="November 10">10</a></td> <td><a href="/wiki/November_11" title="November 11">11</a></td> <td><a href="/wiki/November_12" title="November 12">12</a></td> <td><a href="/wiki/November_13" title="November 13">13</a></td> <td><a href="/wiki/November_14" title="November 14">14</a></td> <td><a href="/wiki/November_15" title="November 15">15</a></td> <td><a href="/wiki/November_16" title="November 16">16</a> </td></tr> <tr> <td><a href="/wiki/November_17" title="November 17">17</a></td> <td><a href="/wiki/November_18" title="November 18">18</a></td> <td><a href="/wiki/November_19" title="November 19">19</a></td> <td><a href="/wiki/November_20" title="November 20">20</a></td> <td><a href="/wiki/November_21" title="November 21">21</a></td> <td><a href="/wiki/November_22" title="November 22">22</a></td> <td><a href="/wiki/November_23" title="November 23">23</a> </td></tr> <tr> <td><a href="/wiki/November_24" title="November 24">24</a></td> <td><a href="/wiki/November_25" title="November 25">25</a></td> <td><a href="/wiki/November_26" title="November 26">26</a></td> <td><a href="/wiki/November_27" title="November 27">27</a></td> <td><a href="/wiki/November_28" title="November 28">28</a></td> <td><a href="/wiki/November_29" title="November 29">29</a></td> <td><a href="/wiki/November_30" title="November 30">30</a> </td></tr> <tr class="calendar-purple" style=""> <td colspan="7"><b><a href="/wiki/2024" title="2024">2024</a></b> </td></tr></tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Kalender_Indonesia.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Kalender_Indonesia.jpg/220px-Kalender_Indonesia.jpg" decoding="async" width="220" height="293" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Kalender_Indonesia.jpg/330px-Kalender_Indonesia.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Kalender_Indonesia.jpg/440px-Kalender_Indonesia.jpg 2x" data-file-width="2280" data-file-height="3040" /></a><figcaption>Modern day <a href="/wiki/Indonesia" title="Indonesia">Indonesian</a> <a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian calendar</a> for a <a href="/wiki/Catholic_Church" title="Catholic Church">Catholic</a> <a href="/wiki/Church_(building)" title="Church (building)">church</a></figcaption></figure> <figure typeof="mw:File/Thumb"><a href="/wiki/File:Calendar_(part_of_a_set)_MET_DP-13486-011.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/69/Calendar_%28part_of_a_set%29_MET_DP-13486-011.jpg/250px-Calendar_%28part_of_a_set%29_MET_DP-13486-011.jpg" decoding="async" width="250" height="313" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/69/Calendar_%28part_of_a_set%29_MET_DP-13486-011.jpg/375px-Calendar_%28part_of_a_set%29_MET_DP-13486-011.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/69/Calendar_%28part_of_a_set%29_MET_DP-13486-011.jpg/500px-Calendar_%28part_of_a_set%29_MET_DP-13486-011.jpg 2x" data-file-width="3200" data-file-height="4000" /></a><figcaption>British calendar, 1851, gilt bronze and <a href="/wiki/Malachite" title="Malachite">malachite</a>, height: 20.3&#160;cm, <a href="/wiki/Metropolitan_Museum_of_Art" title="Metropolitan Museum of Art">Metropolitan Museum of Art</a> (New York City)</figcaption></figure> <p>A <b>calendar</b> is a system of organizing <a href="/wiki/Day" title="Day">days</a>. This is done by giving names to periods of <a href="/wiki/Time" title="Time">time</a>, typically days, <a href="/wiki/Weeks" class="mw-redirect" title="Weeks">weeks</a>, <a href="/wiki/Month" title="Month">months</a> and <a href="/wiki/Years" class="mw-redirect" title="Years">years</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> A <a href="/wiki/Calendar_date" title="Calendar date">date</a> is the designation of a single and specific day within such a system. A calendar is also a physical record (often paper) of such a system. A calendar can also mean a list of planned events, such as a <a href="/wiki/Court_calendar" class="mw-redirect" title="Court calendar">court calendar</a>, or a partly or fully chronological list of documents, such as a calendar of wills. </p><p>Periods in a calendar (such as years and months) are usually, though not necessarily, synchronized with the cycle of the <a href="/wiki/Solar_calendar" title="Solar calendar">sun</a> or the <a href="/wiki/Lunar_calendar" title="Lunar calendar">moon</a>.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Introduction_to_Calendars_5-0" class="reference"><a href="#cite_note-Introduction_to_Calendars-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> The most common type of pre-modern calendar was the <a href="/wiki/Lunisolar_calendar" title="Lunisolar calendar">lunisolar calendar</a>, a lunar calendar that occasionally adds one <a href="/wiki/Intercalary_month" class="mw-redirect" title="Intercalary month">intercalary month</a> to remain synchronized with the <a href="/wiki/Solar_year" class="mw-redirect" title="Solar year">solar year</a> over the long term. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Etymology">Etymology</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=1" title="Edit section: Etymology"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The term <i>calendar</i> is taken from <span title="Latin-language text"><i lang="la"><a href="/wiki/Calends" title="Calends">kalendae</a></i></span>,<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> the term for the first day of the month in the Roman calendar, related to the verb <span title="Latin-language text"><i lang="la">calare</i></span> 'to call out', referring to the "calling" of the new moon when it was first seen.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Latin <span title="Latin-language text"><i lang="la">calendarium</i></span> meant 'account book, register' (as accounts were settled and debts were collected on the calends of each month).<sup id="cite_ref-:0_10-0" class="reference"><a href="#cite_note-:0-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup> The Latin term was adopted in <a href="/wiki/Old_French" title="Old French">Old French</a> as <span title="Old French (842-ca. 1400)-language text"><i lang="fro">calendier</i></span> and from there in <a href="/wiki/Middle_English" title="Middle English">Middle English</a> as <span title="Middle English (1100-1500)-language text"><i lang="enm">calender</i></span> by the 13th&#160;century (the spelling <i>calendar</i> is early modern).<sup id="cite_ref-:0_10-1" class="reference"><a href="#cite_note-:0-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=2" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/History_of_calendars" title="History of calendars">History of calendars</a></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Further information: <a href="/wiki/Week" title="Week">Week</a>, <a href="/wiki/Calendar_epoch" class="mw-redirect" title="Calendar epoch">Calendar epoch</a>, <a href="/wiki/Month" title="Month">Month</a>, <a href="/wiki/Lunisolar_calendar" title="Lunisolar calendar">Lunisolar calendar</a>, <a href="/wiki/Computus" class="mw-redirect" title="Computus">Computus</a>, and <a href="/wiki/Calendar_reform" title="Calendar reform">Calendar reform</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Equinozio_da_Pizzo_Vento,tramonto_fondachelli_fantina,_sicilia.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Equinozio_da_Pizzo_Vento%2Ctramonto_fondachelli_fantina%2C_sicilia.JPG/220px-Equinozio_da_Pizzo_Vento%2Ctramonto_fondachelli_fantina%2C_sicilia.JPG" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Equinozio_da_Pizzo_Vento%2Ctramonto_fondachelli_fantina%2C_sicilia.JPG/330px-Equinozio_da_Pizzo_Vento%2Ctramonto_fondachelli_fantina%2C_sicilia.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Equinozio_da_Pizzo_Vento%2Ctramonto_fondachelli_fantina%2C_sicilia.JPG/440px-Equinozio_da_Pizzo_Vento%2Ctramonto_fondachelli_fantina%2C_sicilia.JPG 2x" data-file-width="2272" data-file-height="1704" /></a><figcaption><a href="/wiki/Equinox" title="Equinox">Equinox</a> seen from the astronomic calendar of Pizzo Vento at <a href="/wiki/Fondachelli-Fantina" title="Fondachelli-Fantina">Fondachelli Fantina</a>, <a href="/wiki/Sicily" title="Sicily">Sicily</a></figcaption></figure> <p>The course of the Sun and the Moon are the most salient regularly recurring natural events useful for <a href="/wiki/Timekeeping" class="mw-redirect" title="Timekeeping">timekeeping</a>, and in pre-modern societies around the world <a href="/wiki/Lunation" class="mw-redirect" title="Lunation">lunation</a> and the <a href="/wiki/Year" title="Year">year</a> were most commonly used as time units. Nevertheless, the Roman calendar contained remnants of a very ancient pre-Etruscan 10-month solar year.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> </p><p>The first recorded physical calendars, dependent on the development of <a href="/wiki/Bronze_Age_writing" class="mw-redirect" title="Bronze Age writing">writing</a> in the <a href="/wiki/Ancient_Near_East" title="Ancient Near East">Ancient Near East</a>, are the <a href="/wiki/Bronze_Age" title="Bronze Age">Bronze Age</a> <a href="/wiki/Egyptian_calendar" title="Egyptian calendar">Egyptian</a> and <a href="/wiki/Sumerian_calendar" class="mw-redirect" title="Sumerian calendar">Sumerian</a> calendars.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> </p><p>During the <a href="/wiki/Vedic_period" title="Vedic period">Vedic period</a> India developed a sophisticated timekeeping methodology and calendars for <a href="/wiki/Vedas" title="Vedas">Vedic</a> rituals.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> According to Yukio Ohashi, the Vedanga calendar in ancient India was based on astronomical studies during the Vedic Period and was not derived from other cultures.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> </p><p>A large number of calendar systems in the Ancient Near East were based on the <a href="/wiki/Babylonian_calendar" title="Babylonian calendar">Babylonian calendar</a> dating from the <a href="/wiki/Iron_Age" title="Iron Age">Iron Age</a>,<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> among them the calendar system of the Persian Empire, which in turn gave rise to the <a href="/wiki/Zoroastrian_calendar" title="Zoroastrian calendar">Zoroastrian calendar</a> and the <a href="/wiki/Hebrew_calendar" title="Hebrew calendar">Hebrew calendar</a>.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">&#91;</span>16<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup> </p><p>A great number of <a href="/wiki/Hellenic_calendars" class="mw-redirect" title="Hellenic calendars">Hellenic calendars</a> were developed in <a href="/wiki/Classical_Greece" title="Classical Greece">Classical Greece</a>, and during the <a href="/wiki/Hellenistic_period" title="Hellenistic period">Hellenistic period</a> they gave rise to the ancient <a href="/wiki/Roman_calendar" title="Roman calendar">Roman calendar</a> and to various <a href="/wiki/Hindu_calendars" class="mw-redirect" title="Hindu calendars">Hindu calendars</a>.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">&#91;</span>18<span class="cite-bracket">&#93;</span></a></sup> </p><p>Calendars in antiquity were <a href="/wiki/Lunisolar" class="mw-redirect" title="Lunisolar">lunisolar</a>, depending on the introduction of <a href="/wiki/Intercalary_month" class="mw-redirect" title="Intercalary month">intercalary months</a> to align the solar and the lunar years. This was mostly based on observation, but there may have been early attempts to model the pattern of intercalation algorithmically, as evidenced in the fragmentary 2nd-century <a href="/wiki/Coligny_calendar" title="Coligny calendar">Coligny calendar</a>. </p><p>The <a href="/wiki/Roman_calendar" title="Roman calendar">Roman calendar</a> was reformed by <a href="/wiki/Julius_Caesar" title="Julius Caesar">Julius Caesar</a> in 46&#160;BC.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">&#91;</span>19<span class="cite-bracket">&#93;</span></a></sup> His "Julian" calendar was no longer dependent on the observation of the new moon, but followed an algorithm of introducing a leap day every four years. This created a dissociation of the calendar <a href="/wiki/Month" title="Month">month</a> from <a href="/wiki/Lunation" class="mw-redirect" title="Lunation">lunation</a>. The <a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian calendar</a>, introduced in 1582, corrected most of the remaining difference between the Julian calendar and the solar year. </p><p>The <a href="/wiki/Islamic_calendar" title="Islamic calendar">Islamic calendar</a> is based on the prohibition of intercalation (<i><a href="/wiki/Nasi%27" title="Nasi&#39;">nasi'</a></i>) by <a href="/wiki/Muhammad" title="Muhammad">Muhammad</a>, in Islamic tradition dated to a sermon given on 9 <a href="/wiki/Dhu_al-Hijjah" title="Dhu al-Hijjah">Dhu al-Hijjah</a> AH&#160;10 (Julian date: 6 March 632). This resulted in an observation-based lunar calendar that shifts relative to the seasons of the solar year. </p><p>There have been several modern proposals for reform of the modern calendar, such as the <a href="/wiki/World_Calendar" title="World Calendar">World Calendar</a>, the <a href="/wiki/International_Fixed_Calendar" title="International Fixed Calendar">International Fixed Calendar</a>, the <a href="/wiki/Holocene_calendar" title="Holocene calendar">Holocene calendar</a>, and the <a href="/wiki/Hanke%E2%80%93Henry_Permanent_Calendar" title="Hanke–Henry Permanent Calendar">Hanke–Henry Permanent Calendar</a>. Such ideas are mooted from time to time, but have failed to gain traction because of the loss of continuity and the massive upheaval that implementing them would involve, as well as their effect on cycles of religious activity. </p> <div class="mw-heading mw-heading2"><h2 id="Systems">Systems</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=3" title="Edit section: Systems"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:Universal_Calendar_including_a_meton_cycle.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/ab/Universal_Calendar_including_a_meton_cycle.svg/350px-Universal_Calendar_including_a_meton_cycle.svg.png" decoding="async" width="350" height="498" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/ab/Universal_Calendar_including_a_meton_cycle.svg/525px-Universal_Calendar_including_a_meton_cycle.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/ab/Universal_Calendar_including_a_meton_cycle.svg/700px-Universal_Calendar_including_a_meton_cycle.svg.png 2x" data-file-width="972" data-file-height="1382" /></a><figcaption>A universal calendar, combining different calendars</figcaption></figure> <p>A full calendar system has a different calendar date for every day.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">&#91;</span>20<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> Thus the week cycle is by itself not a full calendar system;<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> neither is a system to name the days within a year without a system for identifying the years. </p><p>The simplest calendar system just counts time periods from a reference date.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> This applies for the <a href="/wiki/Julian_day" title="Julian day">Julian day</a> or <a href="/wiki/Unix_Time" class="mw-redirect" title="Unix Time">Unix Time</a>. Virtually the only possible variation is using a different reference date, in particular, one less distant in the past to make the numbers smaller. Computations in these systems are just a matter of addition and subtraction. </p><p>Other calendars have one (or multiple) larger units of time. </p><p>Calendars that contain one level of cycles: </p> <ul><li>week and weekday&#160;– this system (without year, the week number keeps on increasing) is not very common</li> <li>year and ordinal date within the year, e.g., the <a href="/wiki/ISO_8601#Ordinal_dates" title="ISO 8601">ISO 8601 ordinal date system</a></li></ul> <p>Calendars with two levels of cycles: </p> <ul><li>year, month, and day&#160;– most systems, including the <a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian calendar</a> (and its very similar predecessor, the <a href="/wiki/Julian_calendar" title="Julian calendar">Julian calendar</a>), the <a href="/wiki/Islamic_calendar" title="Islamic calendar">Islamic calendar</a>, the <a href="/wiki/Solar_Hijri_calendar" title="Solar Hijri calendar">Solar Hijri calendar</a> and the <a href="/wiki/Hebrew_calendar" title="Hebrew calendar">Hebrew calendar</a></li> <li>year, week, and weekday&#160;– e.g., the <a href="/wiki/ISO_week_date" title="ISO week date">ISO week date</a></li></ul> <p>Cycles can be synchronized with periodic phenomena: </p> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Sun_and_Moon_Nuremberg_chronicle.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/0/09/Sun_and_Moon_Nuremberg_chronicle.jpg" decoding="async" width="245" height="237" class="mw-file-element" data-file-width="245" data-file-height="237" /></a><figcaption><a href="/wiki/Sun" title="Sun">Sun</a> and <a href="/wiki/Moon" title="Moon">Moon</a>, Schedel's Nuremberg Chronicle, 1493</figcaption></figure> <ul><li><a href="/wiki/Lunar_calendar" title="Lunar calendar">Lunar calendars</a> are synchronized to the motion of the Moon (<a href="/wiki/Lunar_phase" title="Lunar phase">lunar phases</a>); an example is the Islamic calendar.</li> <li><a href="/wiki/Solar_calendar" title="Solar calendar">Solar calendars</a> are based on perceived <a href="/wiki/Seasonal_year" title="Seasonal year">seasonal</a> changes synchronized to the apparent motion of the Sun; an example is the <a href="/wiki/Persian_calendar" class="mw-redirect" title="Persian calendar">Persian calendar</a>.</li> <li><a href="/wiki/Lunisolar_calendar" title="Lunisolar calendar">Lunisolar calendars</a> are based on a combination of both solar and lunar reckonings; examples include the <a href="/wiki/Chinese_calendar" title="Chinese calendar">traditional calendar of China</a>, the <a href="/wiki/Hindu_calendar" title="Hindu calendar">Hindu calendar</a> in India and Nepal, and the Hebrew calendar.</li> <li>The week cycle is an example of one that is not synchronized to any external phenomenon (although it may have been derived from lunar phases, beginning anew every month).</li></ul> <p>Very commonly a calendar includes more than one type of cycle or has both cyclic and non-cyclic elements. </p><p>Most calendars incorporate more complex cycles. For example, the vast majority of them track years, months, weeks and days. The seven-day week is practically universal, though its use varies. It has run uninterrupted for millennia.<sup id="cite_ref-FOOTNOTEZerubavel1985_24-0" class="reference"><a href="#cite_note-FOOTNOTEZerubavel1985-24"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Solar">Solar</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=4" title="Edit section: Solar"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Solar_calendar" title="Solar calendar">Solar calendar</a></div> <p>Solar calendars assign a <i>date</i> to each <a href="/wiki/Solar_time" title="Solar time">solar day</a>.<sup id="cite_ref-Introduction_to_Calendars_5-1" class="reference"><a href="#cite_note-Introduction_to_Calendars-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> A day may consist of the period between <a href="/wiki/Sunrise" title="Sunrise">sunrise</a> and <a href="/wiki/Sunset" title="Sunset">sunset</a>, with a following period of <a href="/wiki/Night" title="Night">night</a>, or it may be a period between successive events such as two sunsets.<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">&#91;</span>26<span class="cite-bracket">&#93;</span></a></sup> The length of the interval between two such successive events may be allowed to vary slightly during the year, or it may be averaged into a <a href="/wiki/Solar_time" title="Solar time">mean solar day</a>. Other types of calendar may also use a solar day. </p><p>The Egyptians appear to have been the first to develop a solar calendar,<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">&#91;</span>27<span class="cite-bracket">&#93;</span></a></sup> using as a fixed point the annual sunrise reappearance of the Dog Star—<a href="/wiki/Sirius" title="Sirius">Sirius</a>, or Sothis—in the eastern sky, which coincided with the annual flooding of the Nile River.<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">&#91;</span>29<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">&#91;</span>30<span class="cite-bracket">&#93;</span></a></sup> They built a calendar with 365 days, divided into 12 months of 30 days each, with 5 extra days at the end of the year. However, they did not include the extra bit of time in each year, and this caused their calendar to slowly become inaccurate.<sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">&#91;</span>31<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Lunar">Lunar</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=5" title="Edit section: Lunar"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Lunar_calendar" title="Lunar calendar">Lunar calendar</a></div> <p>Not all calendars use the solar year as a unit. A lunar calendar is one in which days are numbered within each <a href="/wiki/Lunar_phase" title="Lunar phase">lunar phase</a> cycle. Because the length of the <a href="/wiki/Lunar_month" title="Lunar month">lunar month</a> is not an even fraction of the length of the <a href="/wiki/Tropical_year" title="Tropical year">tropical year</a>, a purely lunar calendar quickly drifts against the seasons, which do not vary much near the equator. It does, however, stay constant with respect to other phenomena, notably <a href="/wiki/Tide" title="Tide">tides</a>. An example is the <a href="/wiki/Islamic_calendar" title="Islamic calendar">Islamic calendar</a>. Alexander Marshack, in a controversial reading,<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">&#91;</span>32<span class="cite-bracket">&#93;</span></a></sup> believed that marks on a bone baton (<abbr title="circa">c.</abbr><span style="white-space:nowrap;">&#8201;25,000 BC</span>) represented a lunar calendar. Other marked bones may also represent lunar calendars. Similarly, Michael Rappenglueck believes that marks on a 15,000-year-old cave painting represent a lunar calendar.<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">&#91;</span>33<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Lunisolar">Lunisolar</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=6" title="Edit section: Lunisolar"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A <a href="/wiki/Lunisolar_calendar" title="Lunisolar calendar">lunisolar calendar</a> is a lunar calendar that compensates by adding an extra month as needed to realign the months with the seasons. Prominent examples of lunisolar calendar are <a href="/wiki/Hindu_calendar" title="Hindu calendar">Hindu calendar</a> and <a href="/wiki/Buddhist_calendar" title="Buddhist calendar">Buddhist calendar</a> that are popular in <a href="/wiki/South_Asia" title="South Asia">South Asia</a> and <a href="/wiki/Southeast_Asia" title="Southeast Asia">Southeast Asia</a>. Another example is the Hebrew calendar, which uses a <a href="/wiki/Metonic_cycle" title="Metonic cycle">19-year cycle</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Subdivisions">Subdivisions</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=7" title="Edit section: Subdivisions"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Decade" title="Decade">Decade</a>, <a href="/wiki/Century" title="Century">Century</a>, and <a href="/wiki/Millennium" title="Millennium">Millennium</a></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Perpetual_calendar_in_Catalan_circa_year_1925_Patent_in_Barcelona.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Perpetual_calendar_in_Catalan_circa_year_1925_Patent_in_Barcelona.jpg/220px-Perpetual_calendar_in_Catalan_circa_year_1925_Patent_in_Barcelona.jpg" decoding="async" width="220" height="343" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Perpetual_calendar_in_Catalan_circa_year_1925_Patent_in_Barcelona.jpg/330px-Perpetual_calendar_in_Catalan_circa_year_1925_Patent_in_Barcelona.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Perpetual_calendar_in_Catalan_circa_year_1925_Patent_in_Barcelona.jpg/440px-Perpetual_calendar_in_Catalan_circa_year_1925_Patent_in_Barcelona.jpg 2x" data-file-width="2070" data-file-height="3230" /></a><figcaption>Catalan early 20th century perpetual calendar</figcaption></figure> <p>Nearly all calendar systems group consecutive days into "months" and also into "years". In a <i>solar calendar</i> a <i>year</i> approximates Earth's tropical year (that is, the time it takes for a complete cycle of <a href="/wiki/Season" title="Season">seasons</a>), traditionally used to facilitate the planning of <a href="/wiki/Agriculture" title="Agriculture">agricultural</a> activities. In a <i>lunar calendar</i>, the <i>month</i> approximates the cycle of the moon phase. Consecutive days may be grouped into other periods such as the week. </p><p>Because the number of days in the <i>tropical year</i> is not a whole number, a solar calendar must have a different number of days in different years. This may be handled, for example, by adding an extra day in <a href="/wiki/Leap_year" title="Leap year">leap years</a>. The same applies to months in a lunar calendar and also the number of months in a year in a lunisolar calendar. This is generally known as <a href="/wiki/Intercalation_(timekeeping)" title="Intercalation (timekeeping)">intercalation</a>. Even if a calendar is solar, but not lunar, the year cannot be divided entirely into months that never vary in length. </p><p>Cultures may define other units of time, such as the week, for the purpose of scheduling regular activities that do not easily coincide with months or years. Many cultures use different baselines for their calendars' starting years. Historically, several countries have based their calendars on <a href="/wiki/Regnal_years" class="mw-redirect" title="Regnal years">regnal years</a>, a calendar based on the reign of their current sovereign. For example, the year 2006 in <a href="/wiki/Japan" title="Japan">Japan</a> is year 18 Heisei, with Heisei being the era name of <a href="/wiki/Emperor_of_Japan" title="Emperor of Japan">Emperor</a> <a href="/wiki/Akihito" title="Akihito">Akihito</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Other_types">Other types</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=8" title="Edit section: Other types"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><span class="anchor" id="Observational"></span> </p> <div class="mw-heading mw-heading3"><h3 id="Arithmetical_and_astronomical">Arithmetical and astronomical</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=9" title="Edit section: Arithmetical and astronomical"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:JudischerKalender-1831_ubt.jpeg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b4/JudischerKalender-1831_ubt.jpeg/220px-JudischerKalender-1831_ubt.jpeg" decoding="async" width="220" height="346" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b4/JudischerKalender-1831_ubt.jpeg/330px-JudischerKalender-1831_ubt.jpeg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b4/JudischerKalender-1831_ubt.jpeg/440px-JudischerKalender-1831_ubt.jpeg 2x" data-file-width="831" data-file-height="1308" /></a><figcaption>Calendar of the <a href="/wiki/Qahal" title="Qahal">Qahal</a>, 5591 (1831)</figcaption></figure> <p>An <i>astronomical calendar</i> is based on ongoing observation; examples are the religious Islamic calendar and the old religious Jewish calendar in the time of the <a href="/wiki/Second_Temple" title="Second Temple">Second Temple</a>. Such a calendar is also referred to as an <i>observation-based</i> calendar. The advantage of such a calendar is that it is perfectly and perpetually accurate. The disadvantage is that working out when a particular date would occur is difficult. </p><p>An <i>arithmetic calendar</i> is one that is based on a strict set of rules; an example is the current <a href="/wiki/Jewish_calendar" class="mw-redirect" title="Jewish calendar">Jewish calendar</a>. Such a calendar is also referred to as a <i>rule-based</i> calendar. The advantage of such a calendar is the ease of calculating when a particular date occurs. The disadvantage is imperfect accuracy. Furthermore, even if the calendar is very accurate, its accuracy diminishes slowly over time, owing to changes in Earth's rotation. This limits the lifetime of an accurate arithmetic calendar to a few thousand years. After then, the rules would need to be modified from observations made since the invention of the calendar. </p> <div class="mw-heading mw-heading3"><h3 id="Other_variants">Other variants</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=10" title="Edit section: Other variants"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The early <a href="/wiki/Roman_calendar" title="Roman calendar">Roman calendar</a>, created during the reign of <a href="/wiki/Romulus" title="Romulus">Romulus</a>, lumped the 61 days of the winter period them together as simply "winter."<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">&#91;</span>34<span class="cite-bracket">&#93;</span></a></sup> Over time, this period became January and February; through further changes over time (including the creation of the <a href="/wiki/Julian_calendar" title="Julian calendar">Julian calendar</a>) this calendar became the modern Gregorian calendar, introduced in the 1570s.<sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">&#91;</span>35<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">&#91;</span>36<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Usage">Usage</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=11" title="Edit section: Usage"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-center" typeof="mw:File/Thumb"><a href="/wiki/File:World_calendars_map.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4e/World_calendars_map.svg/800px-World_calendars_map.svg.png" decoding="async" width="800" height="352" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4e/World_calendars_map.svg/1200px-World_calendars_map.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4e/World_calendars_map.svg/1600px-World_calendars_map.svg.png 2x" data-file-width="941" data-file-height="414" /></a><figcaption>Current usage of civil calendars in the world. Some countries use an additional calendar not listed here that determine holidays and other traditions, for example the <a href="/wiki/Chinese_calendar" title="Chinese calendar">Chinese</a> or <a href="/wiki/Islamic_calendar" title="Islamic calendar">Islamic</a> calendars.</figcaption></figure> <p>The primary practical use of a calendar is to identify days: to be informed about or to agree on a future event and to record an event that has happened. Days may be significant for agricultural, civil, religious, or social reasons. For example, a calendar provides a way to determine when to start planting or harvesting, which days are <a href="/wiki/Religious_holiday" class="mw-redirect" title="Religious holiday">religious</a> or <a href="/wiki/Civil_holiday" class="mw-redirect" title="Civil holiday">civil holidays</a>, which days mark the beginning and end of business accounting periods, and which days have legal significance, such as the day taxes are due or a contract expires. Also, a calendar may, by identifying a day, provide other useful information about the day such as its season. </p><p>Calendars are also used as part of a complete <a href="/wiki/Timekeeping" class="mw-redirect" title="Timekeeping">timekeeping</a> system: date and time of day together specify a moment in <a href="/wiki/Time" title="Time">time</a>. In the modern world, timekeepers can show time, date, and weekday. Some may also show the lunar phase. </p> <div class="mw-heading mw-heading3"><h3 id="Gregorian">Gregorian</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=12" title="Edit section: Gregorian"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian calendar</a> is the <i><a href="/wiki/De_facto" title="De facto">de facto</a></i> international standard and is used almost everywhere in the world for civil purposes. The widely used solar aspect is a cycle of leap days in a 400-year cycle designed to keep the duration of the year aligned with the <a href="/wiki/Solar_year" class="mw-redirect" title="Solar year">solar year</a>.<sup id="cite_ref-FOOTNOTEBlackburnHolford-Strevens2003682–683_37-0" class="reference"><a href="#cite_note-FOOTNOTEBlackburnHolford-Strevens2003682–683-37"><span class="cite-bracket">&#91;</span>37<span class="cite-bracket">&#93;</span></a></sup> There is a lunar aspect which approximates the position of the moon during the year, and is used in the <a href="/wiki/Computus" class="mw-redirect" title="Computus">calculation of the date of Easter</a>.<sup id="cite_ref-FOOTNOTEBlackburnHolford-Strevens2003817–820_38-0" class="reference"><a href="#cite_note-FOOTNOTEBlackburnHolford-Strevens2003817–820-38"><span class="cite-bracket">&#91;</span>38<span class="cite-bracket">&#93;</span></a></sup> Each Gregorian year has either 365 or 366 days (the leap day being inserted as 29 February), amounting to an average Gregorian year of 365.2425 days (compared to a solar year of 365.2422 days).<sup id="cite_ref-FOOTNOTEDershowitzReingold200847,_187_39-0" class="reference"><a href="#cite_note-FOOTNOTEDershowitzReingold200847,_187-39"><span class="cite-bracket">&#91;</span>39<span class="cite-bracket">&#93;</span></a></sup> </p><p>The Gregorian calendar was introduced in 1582 as a refinement to the <a href="/wiki/Julian_calendar" title="Julian calendar">Julian calendar</a>, that had been in use throughout the European Middle Ages, amounting to a 0.002% correction in the length of the year.<sup id="cite_ref-FOOTNOTEBlackburnHolford-Strevens2003682–683_37-1" class="reference"><a href="#cite_note-FOOTNOTEBlackburnHolford-Strevens2003682–683-37"><span class="cite-bracket">&#91;</span>37<span class="cite-bracket">&#93;</span></a></sup> During the Early Modern period, <a href="/wiki/Adoption_of_the_Gregorian_calendar" title="Adoption of the Gregorian calendar">its adoption was mostly limited</a> to <a href="/wiki/Roman_Catholic" class="mw-redirect" title="Roman Catholic">Roman Catholic</a> nations, but by the 19th century it had become widely adopted for the sake of convenience in international trade. The last European country to adopt it was Greece, in 1923.<sup id="cite_ref-FOOTNOTEBlackburnHolford-Strevens2003682–689_40-0" class="reference"><a href="#cite_note-FOOTNOTEBlackburnHolford-Strevens2003682–689-40"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> </p><p>The <a href="/wiki/Calendar_epoch" class="mw-redirect" title="Calendar epoch">calendar epoch</a> used by the Gregorian calendar is inherited from the medieval convention established by <a href="/wiki/Dionysius_Exiguus" title="Dionysius Exiguus">Dionysius Exiguus</a> and associated with the Julian calendar. The year number is variously given as AD (for <i><a href="/wiki/Anno_Domini" title="Anno Domini">Anno Domini</a></i>) or CE (for <i><a href="/wiki/Common_Era" title="Common Era">Common Era</a></i> or <i>Christian Era</i>).<sup id="cite_ref-FOOTNOTEBlackburnHolford-Strevens2003Chapter:_&quot;Christian_Chronology&quot;_41-0" class="reference"><a href="#cite_note-FOOTNOTEBlackburnHolford-Strevens2003Chapter:_&quot;Christian_Chronology&quot;-41"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Religious">Religious</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=13" title="Edit section: Religious"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Hindu_calendar_1871-72.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/04/Hindu_calendar_1871-72.jpg/220px-Hindu_calendar_1871-72.jpg" decoding="async" width="220" height="595" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/04/Hindu_calendar_1871-72.jpg/330px-Hindu_calendar_1871-72.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/04/Hindu_calendar_1871-72.jpg/440px-Hindu_calendar_1871-72.jpg 2x" data-file-width="640" data-file-height="1731" /></a><figcaption>A Hindu <a href="/wiki/Almanac" title="Almanac">almanac</a> (<i>pancanga</i>) for the year 1871/2 from <a href="/wiki/Rajasthan" title="Rajasthan">Rajasthan</a> (Library of Congress, Asian Division)</figcaption></figure> <p>The most important use of pre-modern calendars is keeping track of the <a href="/wiki/Liturgical_year" title="Liturgical year">liturgical year</a> and the observation of religious feast days. </p><p>While the Gregorian calendar is itself historically motivated to the calculation of the <a href="/wiki/Easter_date" class="mw-redirect" title="Easter date">Easter date</a>, it is now in worldwide secular use as the <i>de facto</i> standard. Alongside the use of the Gregorian calendar for secular matters, there remain several calendars in use for religious purposes. </p><p>Western Christian liturgical calendars are based on the cycle of the Roman Rite of the Catholic Church, and generally include the liturgical seasons of <a href="/wiki/Advent" title="Advent">Advent</a>, <a href="/wiki/Christmas" title="Christmas">Christmas</a>, Ordinary Time (Time after <a href="/wiki/Epiphany_(holiday)" title="Epiphany (holiday)">Epiphany</a>), <a href="/wiki/Lent" title="Lent">Lent</a>, <a href="/wiki/Easter" title="Easter">Easter</a>, and Ordinary Time (Time after <a href="/wiki/Pentecost" title="Pentecost">Pentecost</a>). Some Christian calendars do not include Ordinary Time and every day falls into a denominated season. </p><p>The <a href="/wiki/Eastern_Orthodox_Church" title="Eastern Orthodox Church">Eastern Orthodox Church</a> employs the use of 2 liturgical calendars; the <a href="/wiki/Julian_calendar" title="Julian calendar">Julian calendar</a> (often called the Old Calendar) and the <a href="/wiki/Revised_Julian_calendar" title="Revised Julian calendar">Revised Julian Calendar</a> (often called the New Calendar). The Revised Julian Calendar is nearly the same as the Gregorian calendar, with the addition that years divisible by 100 are not <a href="/wiki/Leap_years" class="mw-redirect" title="Leap years">leap years</a>, except that years with remainders of 200 or 600 when divided by 900 remain leap years, e.g. 2000 and 2400 as in the Gregorian calendar.<sup id="cite_ref-42" class="reference"><a href="#cite_note-42"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup><sup class="noprint selfreference">&#91;<i><a href="/wiki/Talk:Calendar" title="Talk:Calendar">discuss</a></i>&#93;</sup> </p><p>The <a href="/wiki/Islamic_calendar" title="Islamic calendar">Islamic calendar</a> or Hijri calendar is a <a href="/wiki/Lunar_calendar" title="Lunar calendar">lunar calendar</a> consisting of 12 lunar months in a year of 354 or 355 days. It is used to date events in most of the Muslim countries (concurrently with the Gregorian calendar) and used by Muslims everywhere to determine the proper day on which to celebrate Islamic holy days and festivals. Its epoch is the <a href="/wiki/Anno_Hegirae" class="mw-redirect" title="Anno Hegirae">Hijra</a> (corresponding to AD&#160;622). With an annual drift of 11 or 12 days, the seasonal relation is repeated approximately every 33 Islamic years. </p><p>Various <a href="/wiki/Hindu_calendar" title="Hindu calendar">Hindu calendars</a> remain in use in the Indian subcontinent, including the <a href="/wiki/Nepali_calendar_(disambiguation)" class="mw-redirect mw-disambig" title="Nepali calendar (disambiguation)">Nepali calendars</a>, <a href="/wiki/Bengali_calendar" class="mw-redirect" title="Bengali calendar">Bengali calendar</a>, <a href="/wiki/Malayalam_calendar" title="Malayalam calendar">Malayalam calendar</a>, <a href="/wiki/Tamil_calendar" title="Tamil calendar">Tamil calendar</a>, <a href="/wiki/Vikrama_Samvat" class="mw-redirect" title="Vikrama Samvat">Vikrama Samvat</a> used in Northern India, and <a href="/wiki/Shalivahana_era" class="mw-redirect" title="Shalivahana era">Shalivahana</a> calendar in the <a href="/wiki/Deccan_Plateau" title="Deccan Plateau">Deccan</a> states. </p><p>The <a href="/wiki/Buddhist_calendar" title="Buddhist calendar">Buddhist calendar</a> and the traditional lunisolar calendars of <a href="/wiki/Cambodia" title="Cambodia">Cambodia</a>, <a href="/wiki/Laos" title="Laos">Laos</a>, <a href="/wiki/Myanmar" title="Myanmar">Myanmar</a>, <a href="/wiki/Sri_Lanka" title="Sri Lanka">Sri Lanka</a> and <a href="/wiki/Thailand" title="Thailand">Thailand</a> are also based on an older version of the Hindu calendar. </p><p>Most of the Hindu calendars are inherited from a system first enunciated in <a href="/wiki/Vedanga_Jyotisha" title="Vedanga Jyotisha">Vedanga Jyotisha</a> of Lagadha, standardized in the <i><a href="/wiki/Surya_Siddhanta" title="Surya Siddhanta">Sūrya Siddhānta</a></i> and subsequently reformed by astronomers such as <a href="/wiki/Aryabhata" title="Aryabhata">Āryabhaṭa</a> (AD&#160;499), <a href="/wiki/Varahamihira" class="mw-redirect" title="Varahamihira">Varāhamihira</a> (6th century) and <a href="/wiki/Bh%C4%81skara_II" title="Bhāskara II">Bhāskara II</a> (12th century). </p><p>The <a href="/wiki/Hebrew_calendar" title="Hebrew calendar">Hebrew calendar</a> is used by <a href="/wiki/Jews" title="Jews">Jews</a> worldwide for religious and cultural affairs, also influences civil matters in Israel (such as <a href="/wiki/Public_holiday" title="Public holiday">national holidays</a>) and can be used business dealings (such as for the dating of <a href="/wiki/Cheque" title="Cheque">cheques</a>).<sup id="cite_ref-43" class="reference"><a href="#cite_note-43"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> </p><p>Followers of the <a href="/wiki/Bah%C3%A1%CA%BC%C3%AD_Faith" title="Baháʼí Faith">Baháʼí Faith</a> use the <a href="/wiki/Bah%C3%A1%CA%BC%C3%AD_calendar" title="Baháʼí calendar">Baháʼí calendar</a>. The Baháʼí Calendar, also known as the Badi Calendar was first established by the Bab in the Kitab-i-Asma. The Baháʼí Calendar is also purely a solar calendar and comprises 19 months each having nineteen days. </p> <div class="mw-heading mw-heading3"><h3 id="National">National</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=14" title="Edit section: National"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/Chinese_calendar" title="Chinese calendar">Chinese</a>, <a href="/wiki/Hebrew_calendar" title="Hebrew calendar">Hebrew</a>, <a href="/wiki/Hindu_calendar" title="Hindu calendar">Hindu</a>, and <a href="/wiki/Julian_calendar" title="Julian calendar">Julian</a> calendars are widely used for religious and social purposes. </p><p>The <a href="/wiki/Solar_Hijri_calendar" title="Solar Hijri calendar">Iranian (Persian) calendar</a> is used in <a href="/wiki/Iran" title="Iran">Iran</a> and some parts of <a href="/wiki/Afghanistan" title="Afghanistan">Afghanistan</a>. The <a href="/wiki/Assyrian_calendar" title="Assyrian calendar">Assyrian calendar</a> is in use by the members of the Assyrian community in the Middle East (mainly Iraq, Syria, Turkey, and Iran) and the diaspora. The first year of the calendar is exactly 4750 years prior to the start of the Gregorian calendar. The <a href="/wiki/Ethiopian_calendar" title="Ethiopian calendar">Ethiopian calendar</a> or Ethiopic calendar is the principal calendar used in <a href="/wiki/Ethiopia" title="Ethiopia">Ethiopia</a> and <a href="/wiki/Eritrea" title="Eritrea">Eritrea</a>, with the <a href="/wiki/Oromo_calendar" class="mw-redirect" title="Oromo calendar">Oromo calendar</a> also in use in some areas. In neighboring <a href="/wiki/Somalia" title="Somalia">Somalia</a>, the <a href="/wiki/Somali_calendar" title="Somali calendar">Somali calendar</a> co-exists alongside the Gregorian and Islamic calendars. In <a href="/wiki/Thailand" title="Thailand">Thailand</a>, where the <a href="/wiki/Thai_solar_calendar" title="Thai solar calendar">Thai solar calendar</a> is used, the months and days have adopted the western standard, although the years are still based on the traditional <a href="/wiki/Buddhist_calendar" title="Buddhist calendar">Buddhist calendar</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Fiscal">Fiscal</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=15" title="Edit section: Fiscal"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Fiscal_calendar" class="mw-redirect" title="Fiscal calendar">Fiscal calendar</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Pieter_Brueghel_the_Younger_(or_workshop)_The_Payment_of_the_Tithes_Bonhams.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/76/Pieter_Brueghel_the_Younger_%28or_workshop%29_The_Payment_of_the_Tithes_Bonhams.jpg/220px-Pieter_Brueghel_the_Younger_%28or_workshop%29_The_Payment_of_the_Tithes_Bonhams.jpg" decoding="async" width="220" height="137" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/76/Pieter_Brueghel_the_Younger_%28or_workshop%29_The_Payment_of_the_Tithes_Bonhams.jpg/330px-Pieter_Brueghel_the_Younger_%28or_workshop%29_The_Payment_of_the_Tithes_Bonhams.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/76/Pieter_Brueghel_the_Younger_%28or_workshop%29_The_Payment_of_the_Tithes_Bonhams.jpg/440px-Pieter_Brueghel_the_Younger_%28or_workshop%29_The_Payment_of_the_Tithes_Bonhams.jpg 2x" data-file-width="6062" data-file-height="3780" /></a><figcaption><i>The Payment of the Tithes</i> (The tax-collector), also known as <i>Village Lawyer</i>, by <a href="/wiki/Pieter_Brueghel_the_Younger" title="Pieter Brueghel the Younger">Pieter Brueghel the Younger</a> </figcaption></figure> <p>A fiscal calendar generally means the accounting year of a government or a business. It is used for budgeting, keeping accounts, and taxation. It is a set of 12 months that may start at any date in a year. The US government's fiscal year starts on 1 October and ends on 30 September. The government of India's fiscal year starts on 1 April and ends on 31 March. Small traditional businesses in India start the fiscal year on <a href="/wiki/Diwali" title="Diwali">Diwali</a> festival and end the day before the next year's Diwali festival. </p><p>In accounting (and particularly accounting software), a fiscal calendar (such as a <a href="/wiki/4%E2%80%934%E2%80%935_calendar" title="4–4–5 calendar">4/4/5 calendar</a>) fixes each month at a specific number of weeks to facilitate comparisons from month to month and year to year. January always has exactly 4 weeks (Sunday through Saturday), February has 4 weeks, March has 5 weeks, etc. Note that this calendar will normally need to add a 53rd week to every 5th or 6th year, which might be added to December or might not be, depending on how the organization uses those dates. There exists an international standard way to do this (the <a href="/wiki/ISO_8601" title="ISO 8601">ISO week</a>). The ISO week starts on a Monday and ends on a Sunday. Week 1 is always the week that contains 4 January in the Gregorian calendar. </p> <div class="mw-heading mw-heading2"><h2 id="Formats">Formats</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=16" title="Edit section: Formats"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1251242444"><table class="box-Unreferenced_section plainlinks metadata ambox ambox-content ambox-Unreferenced" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This section <b>does not <a href="/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources">cite</a> any <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">sources</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/Calendar" title="Special:EditPage/Calendar">improve this section</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and <a href="/wiki/Wikipedia:Verifiability#Burden_of_evidence" title="Wikipedia:Verifiability">removed</a>.</span> <span class="date-container"><i>(<span class="date">April 2023</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Petaluma_and_Santa_Rosa_Railroad_Co._Calendar.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Petaluma_and_Santa_Rosa_Railroad_Co._Calendar.jpg/220px-Petaluma_and_Santa_Rosa_Railroad_Co._Calendar.jpg" decoding="async" width="220" height="308" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Petaluma_and_Santa_Rosa_Railroad_Co._Calendar.jpg/330px-Petaluma_and_Santa_Rosa_Railroad_Co._Calendar.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Petaluma_and_Santa_Rosa_Railroad_Co._Calendar.jpg/440px-Petaluma_and_Santa_Rosa_Railroad_Co._Calendar.jpg 2x" data-file-width="2663" data-file-height="3728" /></a><figcaption>A calendar from the <a href="/wiki/Petaluma_and_Santa_Rosa_Railroad" title="Petaluma and Santa Rosa Railroad">Petaluma and Santa Rosa Railroad</a></figcaption></figure> <p>The term <i>calendar</i> applies not only to a given scheme of timekeeping but also to a specific record or device displaying such a scheme, for example, an <a href="/wiki/Appointment_book" class="mw-redirect" title="Appointment book">appointment book</a> in the form of a pocket calendar (or <a href="/wiki/Personal_organizer" title="Personal organizer">personal organizer</a>), desktop calendar, a <a href="/wiki/Wall_calendar" class="mw-redirect" title="Wall calendar">wall calendar</a>, etc. </p><p>In a paper calendar, one or two sheets can show a single day, a week, a month, or a year. If a sheet is for a single day, it easily shows the date and the weekday. If a sheet is for multiple days it shows a conversion table to convert from weekday to date and back. With a special pointing device, or by crossing out past days, it may indicate the current date and weekday. This is the most common usage of the word. </p><p>In the US Sunday is considered the first day of the week and so appears on the far left and Saturday the last day of the week appearing on the far right. In Britain, the weekend may appear at the end of the week so the first day is Monday and the last day is Sunday.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">&#91;<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (April 2023)">citation needed</span></a></i>&#93;</sup> The US calendar display is also used in Britain. </p><p>It is common to display the Gregorian calendar in separate monthly grids of seven columns (from Monday to Sunday, or Sunday to Saturday depending on which day is considered to start the week&#160;– this varies according to country)<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">&#91;<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (April 2023)">citation needed</span></a></i>&#93;</sup> and five to six rows (or rarely, four rows when the month of February contains 28 days in <a href="/wiki/Common_year" title="Common year">common years</a> beginning on the first day of the week), with the day of the month numbered in each cell, beginning with 1. The sixth row is sometimes eliminated by marking 23/30 and 24/31 together as necessary. </p><p>When working with weeks rather than months, a continuous format is sometimes more convenient, where no blank cells are inserted to ensure that the first day of a new month begins on a fresh row. </p> <div class="mw-heading mw-heading2"><h2 id="Software">Software</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=17" title="Edit section: Software"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Calendaring_software" class="mw-redirect" title="Calendaring software">Calendaring software</a></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Further information: <a href="/wiki/Category:Calendaring_standards" title="Category:Calendaring standards">Category:Calendaring standards</a></div> <p>Calendaring software provides users with an electronic version of a calendar, and may additionally provide an appointment book, address book, or contact list. Calendaring is a standard feature of many <a href="/wiki/Personal_digital_assistant" title="Personal digital assistant">PDAs</a>, <a href="/wiki/Enterprise_digital_assistant" class="mw-redirect" title="Enterprise digital assistant">EDAs</a>, and <a href="/wiki/Smartphones" class="mw-redirect" title="Smartphones">smartphones</a>. The software may be a local package designed for individual use (e.g., <a href="/wiki/Lightning_(software)" title="Lightning (software)">Lightning</a> extension for <a href="/wiki/Mozilla_Thunderbird" title="Mozilla Thunderbird">Mozilla Thunderbird</a>, <a href="/wiki/Microsoft_Outlook" title="Microsoft Outlook">Microsoft Outlook</a> without Exchange Server, or <a href="/wiki/Windows_Calendar" class="mw-redirect" title="Windows Calendar">Windows Calendar</a>) or maybe a networked package that allows for the sharing of information between users (e.g., <a href="/wiki/Mozilla_Sunbird" title="Mozilla Sunbird">Mozilla Sunbird</a>, <a href="/wiki/Windows_Live_Calendar" class="mw-redirect" title="Windows Live Calendar">Windows Live Calendar</a>, <a href="/wiki/Google_Calendar" title="Google Calendar">Google Calendar</a>, or <a href="/wiki/Microsoft_Outlook" title="Microsoft Outlook">Microsoft Outlook</a> with Exchange Server). </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=18" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1184024115">.mw-parser-output .div-col{margin-top:0.3em;column-width:30em}.mw-parser-output .div-col-small{font-size:90%}.mw-parser-output .div-col-rules{column-rule:1px solid #aaa}.mw-parser-output .div-col dl,.mw-parser-output .div-col ol,.mw-parser-output .div-col ul{margin-top:0}.mw-parser-output .div-col li,.mw-parser-output .div-col dd{page-break-inside:avoid;break-inside:avoid-column}</style><div class="div-col"> <ul><li><a href="/wiki/General_Roman_Calendar" title="General Roman Calendar">General Roman Calendar</a></li> <li><a href="/wiki/List_of_calendars" title="List of calendars">List of calendars</a></li> <li><a href="/wiki/Advent_calendar" title="Advent calendar">Advent calendar</a></li> <li><a href="/wiki/Calendar_reform" title="Calendar reform">Calendar reform</a></li> <li><a href="/wiki/Calendrical_calculation" title="Calendrical calculation">Calendrical calculation</a></li> <li><a href="/wiki/Docket_(court)" title="Docket (court)">Docket (court)</a></li> <li><a href="/wiki/History_of_calendars" title="History of calendars">History of calendars</a></li> <li><a href="/wiki/Horology" class="mw-redirect" title="Horology">Horology</a></li> <li><a href="/wiki/List_of_international_common_standards" title="List of international common standards">List of international common standards</a></li> <li><a href="/wiki/List_of_unofficial_observances_by_date" class="mw-redirect" title="List of unofficial observances by date">List of unofficial observances by date</a></li> <li><a href="/wiki/Real-time_clock" title="Real-time clock">Real-time clock</a> (RTC), which underlies the Calendar software on modern computers.</li> <li><a href="/wiki/Unit_of_time" title="Unit of time">Unit of time</a></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=19" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Citations">Citations</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=20" title="Edit section: Citations"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output 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.citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://eclipse.gsfc.nasa.gov/SEhelp/calendars.html">"Calendars and their History"</a>. <i>eclipse.gsfc.nasa.gov</i><span class="reference-accessdate">. Retrieved <span class="nowrap">12 March</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=eclipse.gsfc.nasa.gov&amp;rft.atitle=Calendars+and+their+History&amp;rft_id=https%3A%2F%2Feclipse.gsfc.nasa.gov%2FSEhelp%2Fcalendars.html&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGuo2018" class="citation book cs1">Guo, Rongxing (16 May 2018). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=8QNbDwAAQBAJ&amp;dq=A+calendar+is+a+system+of+organizing+days.+This+is+done+by+giving+names+to+periods+of+time,+typically+days,+weeks,+months+and+years.&amp;pg=PA159"><i>Human-Earth System Dynamics: Implications to Civilizations</i></a>. Springer. p.&#160;159. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-981-13-0547-4" title="Special:BookSources/978-981-13-0547-4"><bdi>978-981-13-0547-4</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Human-Earth+System+Dynamics%3A+Implications+to+Civilizations&amp;rft.pages=159&amp;rft.pub=Springer&amp;rft.date=2018-05-16&amp;rft.isbn=978-981-13-0547-4&amp;rft.aulast=Guo&amp;rft.aufirst=Rongxing&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D8QNbDwAAQBAJ%26dq%3DA%2Bcalendar%2Bis%2Ba%2Bsystem%2Bof%2Borganizing%2Bdays.%2BThis%2Bis%2Bdone%2Bby%2Bgiving%2Bnames%2Bto%2Bperiods%2Bof%2Btime%2C%2Btypically%2Bdays%2C%2Bweeks%2C%2Bmonths%2Band%2Byears.%26pg%3DPA159&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBondHughes2013" class="citation book cs1">Bond, Thomas; Hughes, Chris (3 December 2013). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=ADJEAgAAQBAJ&amp;dq=A+calendar+is+a+system+of+organizing+days.+This+is+done+by+giving+names+to+periods+of+time,+typically+days,+weeks,+months+and+years.&amp;pg=RA1-PA9"><i>Singapore PSLE Mathematics Challenging Practice Solutions (Yellowreef)</i></a>. Yellowreef Limited. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-7978-0222-3" title="Special:BookSources/978-0-7978-0222-3"><bdi>978-0-7978-0222-3</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Singapore+PSLE+Mathematics+Challenging+Practice+Solutions+%28Yellowreef%29&amp;rft.pub=Yellowreef+Limited&amp;rft.date=2013-12-03&amp;rft.isbn=978-0-7978-0222-3&amp;rft.aulast=Bond&amp;rft.aufirst=Thomas&amp;rft.au=Hughes%2C+Chris&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DADJEAgAAQBAJ%26dq%3DA%2Bcalendar%2Bis%2Ba%2Bsystem%2Bof%2Borganizing%2Bdays.%2BThis%2Bis%2Bdone%2Bby%2Bgiving%2Bnames%2Bto%2Bperiods%2Bof%2Btime%2C%2Btypically%2Bdays%2C%2Bweeks%2C%2Bmonths%2Band%2Byears.%26pg%3DRA1-PA9&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.medicalnewstoday.com/articles/menstrual-cycles-and-lunar-cycles-is-there-a-link">"Do menstrual and lunar cycles synchronize? What scientists say"</a>. <i>www.medicalnewstoday.com</i>. 12 February 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">12 March</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=www.medicalnewstoday.com&amp;rft.atitle=Do+menstrual+and+lunar+cycles+synchronize%3F+What+scientists+say&amp;rft.date=2021-02-12&amp;rft_id=https%3A%2F%2Fwww.medicalnewstoday.com%2Farticles%2Fmenstrual-cycles-and-lunar-cycles-is-there-a-link&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-Introduction_to_Calendars-5"><span class="mw-cite-backlink">^ <a href="#cite_ref-Introduction_to_Calendars_5-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Introduction_to_Calendars_5-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://aa.usno.navy.mil/faq/calendars">"Introduction to Calendars"</a>. <i>aa.usno.navy.mil</i><span class="reference-accessdate">. Retrieved <span class="nowrap">12 March</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=aa.usno.navy.mil&amp;rft.atitle=Introduction+to+Calendars&amp;rft_id=https%3A%2F%2Faa.usno.navy.mil%2Ffaq%2Fcalendars&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://mabscross.co.uk/wp-content/uploads/2020/06/3.-History-Calendar.pdf">"History – Ancient Egyptian Calendar"</a> <span class="cs1-format">(PDF)</span><span class="reference-accessdate">. Retrieved <span class="nowrap">12 March</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=History+%E2%80%93+Ancient+Egyptian+Calendar&amp;rft_id=https%3A%2F%2Fmabscross.co.uk%2Fwp-content%2Fuploads%2F2020%2F06%2F3.-History-Calendar.pdf&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMa&#39;Atnefert2011" class="citation book cs1">Ma'Atnefert, Mwt Seshatms Nkatraet (2011). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=C7KnAgAAQBAJ&amp;dq=The+term+calendar+is+taken+from+kalendae,&amp;pg=PA9"><i>You are Harmony ... Take Time to Harmonize ... Calendars and Time Connecting</i></a>. Lulu.com. p.&#160;9. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-1-257-10758-2" title="Special:BookSources/978-1-257-10758-2"><bdi>978-1-257-10758-2</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=You+are+Harmony+...+Take+Time+to+Harmonize+...+Calendars+and+Time+Connecting&amp;rft.pages=9&amp;rft.pub=Lulu.com&amp;rft.date=2011&amp;rft.isbn=978-1-257-10758-2&amp;rft.aulast=Ma%27Atnefert&amp;rft.aufirst=Mwt+Seshatms+Nkatraet&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DC7KnAgAAQBAJ%26dq%3DThe%2Bterm%2Bcalendar%2Bis%2Btaken%2Bfrom%2Bkalendae%2C%26pg%3DPA9&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLewis2003" class="citation book cs1">Lewis, James R. (1 March 2003). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=qQFlCwAAQBAJ&amp;dq=The+term+calendar+is+taken+from+kalendae,&amp;pg=PA459"><i>The Astrology Book: The Encyclopedia of Heavenly Influences</i></a>. Visible Ink Press. p.&#160;459. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-1-57859-246-3" title="Special:BookSources/978-1-57859-246-3"><bdi>978-1-57859-246-3</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Astrology+Book%3A+The+Encyclopedia+of+Heavenly+Influences&amp;rft.pages=459&amp;rft.pub=Visible+Ink+Press&amp;rft.date=2003-03-01&amp;rft.isbn=978-1-57859-246-3&amp;rft.aulast=Lewis&amp;rft.aufirst=James+R.&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DqQFlCwAAQBAJ%26dq%3DThe%2Bterm%2Bcalendar%2Bis%2Btaken%2Bfrom%2Bkalendae%2C%26pg%3DPA459&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><i> New Shorter Oxford English Dictionary</i></span> </li> <li id="cite_note-:0-10"><span class="mw-cite-backlink">^ <a href="#cite_ref-:0_10-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:0_10-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSayeed2019" class="citation book cs1">Sayeed, Ahmed (10 August 2019). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=GVeoDwAAQBAJ&amp;dq=Latin+calendarium+meant+&#39;account+book,+register&#39;&amp;pg=PT408"><i>You Must Win: The winner can create History</i></a>. Prowess Publishing. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-1-5457-4730-8" title="Special:BookSources/978-1-5457-4730-8"><bdi>978-1-5457-4730-8</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=You+Must+Win%3A+The+winner+can+create+History&amp;rft.pub=Prowess+Publishing&amp;rft.date=2019-08-10&amp;rft.isbn=978-1-5457-4730-8&amp;rft.aulast=Sayeed&amp;rft.aufirst=Ahmed&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DGVeoDwAAQBAJ%26dq%3DLatin%2Bcalendarium%2Bmeant%2B%27account%2Bbook%2C%2Bregister%27%26pg%3DPT408&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text">"Religion in the Etruscan Period" in <a rel="nofollow" class="external text" href="http://global.britannica.com/topic/Roman-religion">Roman Religion</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20151015213053/http://global.britannica.com/topic/Roman-religion">Archived</a> 15 October 2015 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> in the <i>Encyclopædia Britannica</i></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFShirley2009" class="citation journal cs1">Shirley, Lawrence (11 February 2009). <a rel="nofollow" class="external text" href="https://dx.doi.org/10.4169/loci003264">"The Mayan and Other Ancient Calendars"</a>. <i>Convergence</i>. Washington, DC. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.4169%2Floci003264">10.4169/loci003264</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230409163211/https://www.maa.org/press/periodicals/convergence/the-mayan-and-other-ancient-calendars">Archived</a> from the original on 9 April 2023<span class="reference-accessdate">. Retrieved <span class="nowrap">16 March</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Convergence&amp;rft.atitle=The+Mayan+and+Other+Ancient+Calendars&amp;rft.date=2009-02-11&amp;rft_id=info%3Adoi%2F10.4169%2Floci003264&amp;rft.aulast=Shirley&amp;rft.aufirst=Lawrence&amp;rft_id=http%3A%2F%2Fdx.doi.org%2F10.4169%2Floci003264&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPlofker2009" class="citation book cs1">Plofker, Kim (2009). <i>Mathematics in India</i>. Princeton University Press. pp.&#160;10, 35–36, 67. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-691-12067-6" title="Special:BookSources/978-0-691-12067-6"><bdi>978-0-691-12067-6</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Mathematics+in+India&amp;rft.pages=10%2C+35-36%2C+67&amp;rft.pub=Princeton+University+Press&amp;rft.date=2009&amp;rft.isbn=978-0-691-12067-6&amp;rft.aulast=Plofker&amp;rft.aufirst=Kim&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-14">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFAndersen1999" class="citation book cs1">Andersen, Johannes (31 January 1999). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=gQYscrT0fgQC"><i>Highlights of Astronomy, Volume 11B: As Presented at the XXIIIrd General Assembly of the IAU, 1997</i></a>. Springer Science &amp; Business Media. p.&#160;719. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-7923-5556-4" title="Special:BookSources/978-0-7923-5556-4"><bdi>978-0-7923-5556-4</bdi></a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230111163620/https://books.google.com/books?id=gQYscrT0fgQC">Archived</a> from the original on 11 January 2023<span class="reference-accessdate">. Retrieved <span class="nowrap">12 March</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Highlights+of+Astronomy%2C+Volume+11B%3A+As+Presented+at+the+XXIIIrd+General+Assembly+of+the+IAU%2C+1997&amp;rft.pages=719&amp;rft.pub=Springer+Science+%26+Business+Media&amp;rft.date=1999-01-31&amp;rft.isbn=978-0-7923-5556-4&amp;rft.aulast=Andersen&amp;rft.aufirst=Johannes&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DgQYscrT0fgQC&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-15">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=cg0OAQAAMAAJ&amp;q=A+large+number+of+calendar+systems+in+the+Ancient+Near+East+were+based+on+the+Babylonian+calendar+dating+from+the+Iron+Age"><i>Civilizations of the Ancient Near East</i></a>. Scribner. 1995. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-684-19279-6" title="Special:BookSources/978-0-684-19279-6"><bdi>978-0-684-19279-6</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Civilizations+of+the+Ancient+Near+East&amp;rft.pub=Scribner&amp;rft.date=1995&amp;rft.isbn=978-0-684-19279-6&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3Dcg0OAQAAMAAJ%26q%3DA%2Blarge%2Bnumber%2Bof%2Bcalendar%2Bsystems%2Bin%2Bthe%2BAncient%2BNear%2BEast%2Bwere%2Bbased%2Bon%2Bthe%2BBabylonian%2Bcalendar%2Bdating%2Bfrom%2Bthe%2BIron%2BAge&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-16">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.egypttoday.com/Article/4/107766/Egyptians-celebrate-new-Egyptian-year-on-September-11">"Egyptians celebrate new Egyptian year on September 11"</a>. <i>EgyptToday</i>. 12 September 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">12 March</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=EgyptToday&amp;rft.atitle=Egyptians+celebrate+new+Egyptian+year+on+September+11&amp;rft.date=2021-09-12&amp;rft_id=https%3A%2F%2Fwww.egypttoday.com%2FArticle%2F4%2F107766%2FEgyptians-celebrate-new-Egyptian-year-on-September-11&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-17">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSayeed2019" class="citation book cs1">Sayeed, Ahmed (10 August 2019). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=GVeoDwAAQBAJ&amp;dq=calendar+system+of+the+Persian+Empire,+which+in+turn+gave+rise+to+the+Zoroastrian+calendar+and+the+Hebrew+calendar.&amp;pg=PT407"><i>You Must Win: The winner can create History</i></a>. Prowess Publishing. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-1-5457-4730-8" title="Special:BookSources/978-1-5457-4730-8"><bdi>978-1-5457-4730-8</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=You+Must+Win%3A+The+winner+can+create+History&amp;rft.pub=Prowess+Publishing&amp;rft.date=2019-08-10&amp;rft.isbn=978-1-5457-4730-8&amp;rft.aulast=Sayeed&amp;rft.aufirst=Ahmed&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DGVeoDwAAQBAJ%26dq%3Dcalendar%2Bsystem%2Bof%2Bthe%2BPersian%2BEmpire%2C%2Bwhich%2Bin%2Bturn%2Bgave%2Brise%2Bto%2Bthe%2BZoroastrian%2Bcalendar%2Band%2Bthe%2BHebrew%2Bcalendar.%26pg%3DPT407&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-18">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.britannica.com/science/calendar">"Calendar - The Early Roman Calendar"</a>. <i>Encyclopedia Britannica</i>. 24 December 2020. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20210104181246/https://www.britannica.com/science/calendar">Archived</a> from the original on 4 January 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">19 January</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=Encyclopedia+Britannica&amp;rft.atitle=Calendar+-+The+Early+Roman+Calendar&amp;rft.date=2020-12-24&amp;rft_id=https%3A%2F%2Fwww.britannica.com%2Fscience%2Fcalendar&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-19"><span class="mw-cite-backlink"><b><a href="#cite_ref-19">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20201202131025/https://www.calendar.com/history-of-the-calendar/">"The History of the Calendar"</a>. Archived from <a rel="nofollow" class="external text" href="https://www.calendar.com/history-of-the-calendar/">the original</a> on 2 December 2020.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=The+History+of+the+Calendar&amp;rft_id=https%3A%2F%2Fwww.calendar.com%2Fhistory-of-the-calendar%2F&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-20"><span class="mw-cite-backlink"><b><a href="#cite_ref-20">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFOnlineverdan" class="citation book cs1">Onlineverdan. <a rel="nofollow" class="external text" href="https://books.google.com/books?id=f3uMDwAAQBAJ&amp;dq=A+full+calendar+system+has+a+different+calendar+date+for+every+day&amp;pg=SA10-PA6"><i>APTITUDE &amp; REASONING for GATE &amp; ESE 2020</i></a>. Infinity Educations. pp.&#160;10–6. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-81-940294-3-4" title="Special:BookSources/978-81-940294-3-4"><bdi>978-81-940294-3-4</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=APTITUDE+%26+REASONING+for+GATE+%26+ESE+2020&amp;rft.pages=10-6&amp;rft.pub=Infinity+Educations&amp;rft.isbn=978-81-940294-3-4&amp;rft.au=Onlineverdan&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3Df3uMDwAAQBAJ%26dq%3DA%2Bfull%2Bcalendar%2Bsystem%2Bhas%2Ba%2Bdifferent%2Bcalendar%2Bdate%2Bfor%2Bevery%2Bday%26pg%3DSA10-PA6&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-21"><span class="mw-cite-backlink"><b><a href="#cite_ref-21">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJain2019" class="citation book cs1">Jain, Hemant (21 January 2019). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=G4yEDwAAQBAJ&amp;dq=A+full+calendar+system+has+a+different+calendar+date+for+every+day&amp;pg=SA8-PA5"><i>RRB Junior Engineer (2019) - MATHEMATICS for 1st STAGE CBT</i></a>. Infinity Educations. pp.&#160;8–5. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-81-939356-9-9" title="Special:BookSources/978-81-939356-9-9"><bdi>978-81-939356-9-9</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=RRB+Junior+Engineer+%282019%29+-+MATHEMATICS+for+1st+STAGE+CBT&amp;rft.pages=8-5&amp;rft.pub=Infinity+Educations&amp;rft.date=2019-01-21&amp;rft.isbn=978-81-939356-9-9&amp;rft.aulast=Jain&amp;rft.aufirst=Hemant&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DG4yEDwAAQBAJ%26dq%3DA%2Bfull%2Bcalendar%2Bsystem%2Bhas%2Ba%2Bdifferent%2Bcalendar%2Bdate%2Bfor%2Bevery%2Bday%26pg%3DSA8-PA5&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-22"><span class="mw-cite-backlink"><b><a href="#cite_ref-22">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJain2019" class="citation book cs1">Jain, Hemant (21 January 2019). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=G4yEDwAAQBAJ&amp;dq=Thus+the+week+cycle+is+by+itself+not+a+full+calendar+system&amp;pg=SA8-PA5"><i>RRB Junior Engineer (2019) - MATHEMATICS for 1st STAGE CBT</i></a>. Infinity Educations. pp.&#160;8–5. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-81-939356-9-9" title="Special:BookSources/978-81-939356-9-9"><bdi>978-81-939356-9-9</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=RRB+Junior+Engineer+%282019%29+-+MATHEMATICS+for+1st+STAGE+CBT&amp;rft.pages=8-5&amp;rft.pub=Infinity+Educations&amp;rft.date=2019-01-21&amp;rft.isbn=978-81-939356-9-9&amp;rft.aulast=Jain&amp;rft.aufirst=Hemant&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DG4yEDwAAQBAJ%26dq%3DThus%2Bthe%2Bweek%2Bcycle%2Bis%2Bby%2Bitself%2Bnot%2Ba%2Bfull%2Bcalendar%2Bsystem%26pg%3DSA8-PA5&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-23"><span class="mw-cite-backlink"><b><a href="#cite_ref-23">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJain2019" class="citation book cs1">Jain, Hemant (21 January 2019). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=G4yEDwAAQBAJ&amp;dq=The+simplest+calendar+system+just+counts+time+periods+from+a+reference+date.&amp;pg=SA8-PA6"><i>RRB Junior Engineer (2019) - MATHEMATICS for 1st STAGE CBT</i></a>. Infinity Educations. pp.&#160;8–6. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-81-939356-9-9" title="Special:BookSources/978-81-939356-9-9"><bdi>978-81-939356-9-9</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=RRB+Junior+Engineer+%282019%29+-+MATHEMATICS+for+1st+STAGE+CBT&amp;rft.pages=8-6&amp;rft.pub=Infinity+Educations&amp;rft.date=2019-01-21&amp;rft.isbn=978-81-939356-9-9&amp;rft.aulast=Jain&amp;rft.aufirst=Hemant&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DG4yEDwAAQBAJ%26dq%3DThe%2Bsimplest%2Bcalendar%2Bsystem%2Bjust%2Bcounts%2Btime%2Bperiods%2Bfrom%2Ba%2Breference%2Bdate.%26pg%3DSA8-PA6&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-FOOTNOTEZerubavel1985-24"><span class="mw-cite-backlink"><b><a href="#cite_ref-FOOTNOTEZerubavel1985_24-0">^</a></b></span> <span class="reference-text"><a href="#CITEREFZerubavel1985">Zerubavel 1985</a>.</span> </li> <li id="cite_note-25"><span class="mw-cite-backlink"><b><a href="#cite_ref-25">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=drMzAQAAMAAJ&amp;dq=A+day+may+consist+of+the+period+between+sunrise+and+sunset,+with+a+following+period+of+night&amp;pg=PA983"><i>The Jurist</i></a>. S. Sweet. 1861. p.&#160;983.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Jurist&amp;rft.pages=983&amp;rft.pub=S.+Sweet&amp;rft.date=1861&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DdrMzAQAAMAAJ%26dq%3DA%2Bday%2Bmay%2Bconsist%2Bof%2Bthe%2Bperiod%2Bbetween%2Bsunrise%2Band%2Bsunset%2C%2Bwith%2Ba%2Bfollowing%2Bperiod%2Bof%2Bnight%26pg%3DPA983&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-26"><span class="mw-cite-backlink"><b><a href="#cite_ref-26">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFOxossi2022" class="citation book cs1">Oxossi, Diego de (8 July 2022). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=FN11EAAAQBAJ&amp;dq=A+day+may+consist+of+the+period+between+sunrise+and+sunset,+with+a+following+period+of+night&amp;pg=PT37"><i>Sacred Leaves: A Magical Guide to Orisha Herbal Witchcraft</i></a>. Llewellyn Worldwide. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-7387-6721-5" title="Special:BookSources/978-0-7387-6721-5"><bdi>978-0-7387-6721-5</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Sacred+Leaves%3A+A+Magical+Guide+to+Orisha+Herbal+Witchcraft&amp;rft.pub=Llewellyn+Worldwide&amp;rft.date=2022-07-08&amp;rft.isbn=978-0-7387-6721-5&amp;rft.aulast=Oxossi&amp;rft.aufirst=Diego+de&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DFN11EAAAQBAJ%26dq%3DA%2Bday%2Bmay%2Bconsist%2Bof%2Bthe%2Bperiod%2Bbetween%2Bsunrise%2Band%2Bsunset%2C%2Bwith%2Ba%2Bfollowing%2Bperiod%2Bof%2Bnight%26pg%3DPT37&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-27"><span class="mw-cite-backlink"><b><a href="#cite_ref-27">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.britannica.com/science/solar-calendar">"Solar calendar | Ancient Egypt, Mayan, Aztec | Britannica"</a>. <i>www.britannica.com</i><span class="reference-accessdate">. Retrieved <span class="nowrap">12 March</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=www.britannica.com&amp;rft.atitle=Solar+calendar+%7C+Ancient+Egypt%2C+Mayan%2C+Aztec+%7C+Britannica&amp;rft_id=https%3A%2F%2Fwww.britannica.com%2Fscience%2Fsolar-calendar&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-28"><span class="mw-cite-backlink"><b><a href="#cite_ref-28">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="https://books.google.com/books?id=mXsoAQAAIAAJ&amp;q=The+Egyptians+appear+to+have+been+the+first+to+develop+a+solar+calendar,"><i>The New Encyclopædia Britannica: Micropædia</i></a>. Encyclopædia Britannica. 1991. p.&#160;941. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-85229-529-8" title="Special:BookSources/978-0-85229-529-8"><bdi>978-0-85229-529-8</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+New+Encyclop%C3%A6dia+Britannica%3A+Microp%C3%A6dia&amp;rft.pages=941&amp;rft.pub=Encyclop%C3%A6dia+Britannica&amp;rft.date=1991&amp;rft.isbn=978-0-85229-529-8&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DmXsoAQAAIAAJ%26q%3DThe%2BEgyptians%2Bappear%2Bto%2Bhave%2Bbeen%2Bthe%2Bfirst%2Bto%2Bdevelop%2Ba%2Bsolar%2Bcalendar%2C&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-29"><span class="mw-cite-backlink"><b><a href="#cite_ref-29">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLawson2021" class="citation book cs1">Lawson, Russell M. (23 September 2021). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=kwTHEAAAQBAJ&amp;dq=The+Egyptians+appear+to+have+been+the+first+to+develop+a+solar+calendar,&amp;pg=PT179"><i>Science in the Ancient World: From Antiquity through the Middle Ages</i></a>. Bloomsbury Publishing USA. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/979-8-216-14241-6" title="Special:BookSources/979-8-216-14241-6"><bdi>979-8-216-14241-6</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Science+in+the+Ancient+World%3A+From+Antiquity+through+the+Middle+Ages&amp;rft.pub=Bloomsbury+Publishing+USA&amp;rft.date=2021-09-23&amp;rft.isbn=979-8-216-14241-6&amp;rft.aulast=Lawson&amp;rft.aufirst=Russell+M.&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DkwTHEAAAQBAJ%26dq%3DThe%2BEgyptians%2Bappear%2Bto%2Bhave%2Bbeen%2Bthe%2Bfirst%2Bto%2Bdevelop%2Ba%2Bsolar%2Bcalendar%2C%26pg%3DPT179&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-30"><span class="mw-cite-backlink"><b><a href="#cite_ref-30">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMuntz2017" class="citation book cs1">Muntz, Charles (2 January 2017). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=VGHODQAAQBAJ&amp;dq=The+Egyptians+appear+to+have+been+the+first+to+develop+a+solar+calendar,&amp;pg=PT16"><i>Diodorus Siculus and the World of the Late Roman Republic</i></a>. Oxford University Press. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-19-064901-2" title="Special:BookSources/978-0-19-064901-2"><bdi>978-0-19-064901-2</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Diodorus+Siculus+and+the+World+of+the+Late+Roman+Republic&amp;rft.pub=Oxford+University+Press&amp;rft.date=2017-01-02&amp;rft.isbn=978-0-19-064901-2&amp;rft.aulast=Muntz&amp;rft.aufirst=Charles&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DVGHODQAAQBAJ%26dq%3DThe%2BEgyptians%2Bappear%2Bto%2Bhave%2Bbeen%2Bthe%2Bfirst%2Bto%2Bdevelop%2Ba%2Bsolar%2Bcalendar%2C%26pg%3DPT16&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-31"><span class="mw-cite-backlink"><b><a href="#cite_ref-31">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.britannica.com/science/solar-calendar">"Solar calendar &#124; chronology &#124; Britannica"</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Solar+calendar+%26%23124%3B+chronology+%26%23124%3B+Britannica&amp;rft_id=https%3A%2F%2Fwww.britannica.com%2Fscience%2Fsolar-calendar&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-32"><span class="mw-cite-backlink"><b><a href="#cite_ref-32">^</a></b></span> <span class="reference-text">James Elkins, <i><a rel="nofollow" class="external text" href="https://books.google.com/books?id=5Ku6YdWurMgC&amp;pg=PA63&amp;lpg=PA63">Our beautiful, dry, and distant texts</a></i> (1998) 63ff.</span> </li> <li id="cite_note-33"><span class="mw-cite-backlink"><b><a href="#cite_ref-33">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="http://news.bbc.co.uk/2/hi/science/nature/975360.stm">"Oldest lunar calendar identified"</a>. <i>BBC News</i>. 16 October 2000. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20210211233146/http://news.bbc.co.uk/2/hi/science/nature/975360.stm">Archived</a> from the original on 11 February 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">14 March</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=BBC+News&amp;rft.atitle=Oldest+lunar+calendar+identified&amp;rft.date=2000-10-16&amp;rft_id=http%3A%2F%2Fnews.bbc.co.uk%2F2%2Fhi%2Fscience%2Fnature%2F975360.stm&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-34"><span class="mw-cite-backlink"><b><a href="#cite_ref-34">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJones2018" class="citation web cs1">Jones, Derek (8 March 2018). <a rel="nofollow" class="external text" href="https://editions.covecollective.org/chronologies/roman-calendar">"Roman Calendar"</a>. <i>editions.covecollective.org</i><span class="reference-accessdate">. Retrieved <span class="nowrap">18 March</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=editions.covecollective.org&amp;rft.atitle=Roman+Calendar&amp;rft.date=2018-03-08&amp;rft.aulast=Jones&amp;rft.aufirst=Derek&amp;rft_id=https%3A%2F%2Feditions.covecollective.org%2Fchronologies%2Froman-calendar&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-35"><span class="mw-cite-backlink"><b><a href="#cite_ref-35">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation magazine cs1"><a rel="nofollow" class="external text" href="https://time.com/6550127/new-year-celebration-january-calendar-date-history/">"Who Decided January 1st Is the New Year?"</a>. <i>TIME</i>. 29 December 2023<span class="reference-accessdate">. Retrieved <span class="nowrap">18 March</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=TIME&amp;rft.atitle=Who+Decided+January+1st+Is+the+New+Year%3F&amp;rft.date=2023-12-29&amp;rft_id=https%3A%2F%2Ftime.com%2F6550127%2Fnew-year-celebration-january-calendar-date-history%2F&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-36"><span class="mw-cite-backlink"><b><a href="#cite_ref-36">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKelechava2016" class="citation web cs1">Kelechava, Brad (11 February 2016). <a rel="nofollow" class="external text" href="https://blog.ansi.org/2016/02/history-of-standard-gregorian-calendar/">"History of the Standard Gregorian Calendar"</a>. <i>The ANSI Blog</i><span class="reference-accessdate">. Retrieved <span class="nowrap">18 March</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=The+ANSI+Blog&amp;rft.atitle=History+of+the+Standard+Gregorian+Calendar&amp;rft.date=2016-02-11&amp;rft.aulast=Kelechava&amp;rft.aufirst=Brad&amp;rft_id=https%3A%2F%2Fblog.ansi.org%2F2016%2F02%2Fhistory-of-standard-gregorian-calendar%2F&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-FOOTNOTEBlackburnHolford-Strevens2003682–683-37"><span class="mw-cite-backlink">^ <a href="#cite_ref-FOOTNOTEBlackburnHolford-Strevens2003682–683_37-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-FOOTNOTEBlackburnHolford-Strevens2003682–683_37-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><a href="#CITEREFBlackburnHolford-Strevens2003">Blackburn &amp; Holford-Strevens 2003</a>, pp.&#160;682–683.</span> </li> <li id="cite_note-FOOTNOTEBlackburnHolford-Strevens2003817–820-38"><span class="mw-cite-backlink"><b><a href="#cite_ref-FOOTNOTEBlackburnHolford-Strevens2003817–820_38-0">^</a></b></span> <span class="reference-text"><a href="#CITEREFBlackburnHolford-Strevens2003">Blackburn &amp; Holford-Strevens 2003</a>, pp.&#160;817–820.</span> </li> <li id="cite_note-FOOTNOTEDershowitzReingold200847,_187-39"><span class="mw-cite-backlink"><b><a href="#cite_ref-FOOTNOTEDershowitzReingold200847,_187_39-0">^</a></b></span> <span class="reference-text"><a href="#CITEREFDershowitzReingold2008">Dershowitz &amp; Reingold 2008</a>, pp.&#160;47, 187.</span> </li> <li id="cite_note-FOOTNOTEBlackburnHolford-Strevens2003682–689-40"><span class="mw-cite-backlink"><b><a href="#cite_ref-FOOTNOTEBlackburnHolford-Strevens2003682–689_40-0">^</a></b></span> <span class="reference-text"><a href="#CITEREFBlackburnHolford-Strevens2003">Blackburn &amp; Holford-Strevens 2003</a>, pp.&#160;682–689.</span> </li> <li id="cite_note-FOOTNOTEBlackburnHolford-Strevens2003Chapter:_&quot;Christian_Chronology&quot;-41"><span class="mw-cite-backlink"><b><a href="#cite_ref-FOOTNOTEBlackburnHolford-Strevens2003Chapter:_&quot;Christian_Chronology&quot;_41-0">^</a></b></span> <span class="reference-text"><a href="#CITEREFBlackburnHolford-Strevens2003">Blackburn &amp; Holford-Strevens 2003</a>, Chapter: "Christian Chronology".</span> </li> <li id="cite_note-42"><span class="mw-cite-backlink"><b><a href="#cite_ref-42">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.timeanddate.com/calendar/revised-julian-calendar.html">"The Revised Julian Calendar"</a>. <i>www.timeanddate.com</i><span class="reference-accessdate">. Retrieved <span class="nowrap">5 June</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=www.timeanddate.com&amp;rft.atitle=The+Revised+Julian+Calendar&amp;rft_id=https%3A%2F%2Fwww.timeanddate.com%2Fcalendar%2Frevised-julian-calendar.html&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> <li id="cite_note-43"><span class="mw-cite-backlink"><b><a href="#cite_ref-43">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.library.yale.edu/cataloging/hebraica/about-hebrew-calendar">"About the Hebrew Calendar | Yale University Library"</a>. <i>web.library.yale.edu</i><span class="reference-accessdate">. Retrieved <span class="nowrap">18 March</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=web.library.yale.edu&amp;rft.atitle=About+the+Hebrew+Calendar+%7C+Yale+University+Library&amp;rft_id=https%3A%2F%2Fweb.library.yale.edu%2Fcataloging%2Fhebraica%2Fabout-hebrew-calendar&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading3"><h3 id="Sources">Sources</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=21" title="Edit section: Sources"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFcalendar2017" class="citation cs2">"calendar", <a rel="nofollow" class="external text" href="https://www.ahdictionary.com/word/search.html?q=calendar"><i>American Heritage Dictionary</i></a> (5th&#160;ed.), 2017</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=calendar&amp;rft.btitle=American+Heritage+Dictionary&amp;rft.edition=5th&amp;rft.date=2017&amp;rft_id=https%3A%2F%2Fwww.ahdictionary.com%2Fword%2Fsearch.html%3Fq%3Dcalendar&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBirashk1993" class="citation cs2">Birashk, Ahmad (1993), <i>A Comparative Calendar of the Iranian, Muslim Lunar, and Christian Eras for Three Thousand Years</i>, Mazda Publishers, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-939214-95-2" title="Special:BookSources/978-0-939214-95-2"><bdi>978-0-939214-95-2</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=A+Comparative+Calendar+of+the+Iranian%2C+Muslim+Lunar%2C+and+Christian+Eras+for+Three+Thousand+Years&amp;rft.pub=Mazda+Publishers&amp;rft.date=1993&amp;rft.isbn=978-0-939214-95-2&amp;rft.aulast=Birashk&amp;rft.aufirst=Ahmad&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBjörnsson1995" class="citation cs2">Björnsson, Árni (1995) [1977], <i>High Days and Holidays in Iceland</i>, Reykjavík: Mál og menning, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-9979-3-0802-7" title="Special:BookSources/978-9979-3-0802-7"><bdi>978-9979-3-0802-7</bdi></a>, <a href="/wiki/OCLC_(identifier)" class="mw-redirect" title="OCLC (identifier)">OCLC</a>&#160;<a rel="nofollow" class="external text" href="https://search.worldcat.org/oclc/186511596">186511596</a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=High+Days+and+Holidays+in+Iceland&amp;rft.place=Reykjav%C3%ADk&amp;rft.pub=M%C3%A1l+og+menning&amp;rft.date=1995&amp;rft_id=info%3Aoclcnum%2F186511596&amp;rft.isbn=978-9979-3-0802-7&amp;rft.aulast=Bj%C3%B6rnsson&amp;rft.aufirst=%C3%81rni&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBlackburnHolford-Strevens2003" class="citation cs2">Blackburn, Bonnie; Holford-Strevens, Leofranc (2003) [1999], <i>The Oxford Companion to the Year</i> (corrected reprinting of 1st&#160;ed.), Oxford University Press</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Oxford+Companion+to+the+Year&amp;rft.edition=corrected+reprinting+of+1st&amp;rft.pub=Oxford+University+Press&amp;rft.date=2003&amp;rft.aulast=Blackburn&amp;rft.aufirst=Bonnie&amp;rft.au=Holford-Strevens%2C+Leofranc&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFDershowitzReingold2008" class="citation cs2"><a href="/wiki/Nachum_Dershowitz" title="Nachum Dershowitz">Dershowitz, Nachum</a>; <a href="/wiki/Edward_M._Reingold" class="mw-redirect" title="Edward M. Reingold">Reingold, Edward M</a> (2008), <a href="/wiki/Calendrical_Calculations" title="Calendrical Calculations"><i>Calendrical Calculations</i></a>, Cambridge University Press, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-521-70238-6" title="Special:BookSources/978-0-521-70238-6"><bdi>978-0-521-70238-6</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Calendrical+Calculations&amp;rft.pub=Cambridge+University+Press&amp;rft.date=2008&amp;rft.isbn=978-0-521-70238-6&amp;rft.aulast=Dershowitz&amp;rft.aufirst=Nachum&amp;rft.au=Reingold%2C+Edward+M&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFDoggett1992" class="citation cs2">Doggett, L.E. (1992), <a rel="nofollow" class="external text" href="https://archive.org/details/131123ExplanatorySupplementAstronomicalAlmanac/page/n301/mode/1up">"Calendars"</a>, in Seidelmann, P. Kenneth (ed.), <i>Explanatory Supplement to the Astronomical Almanac</i>, University Science Books, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-935702-68-2" title="Special:BookSources/978-0-935702-68-2"><bdi>978-0-935702-68-2</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Calendars&amp;rft.btitle=Explanatory+Supplement+to+the+Astronomical+Almanac&amp;rft.pub=University+Science+Books&amp;rft.date=1992&amp;rft.isbn=978-0-935702-68-2&amp;rft.aulast=Doggett&amp;rft.aufirst=L.E.&amp;rft_id=https%3A%2F%2Farchive.org%2Fdetails%2F131123ExplanatorySupplementAstronomicalAlmanac%2Fpage%2Fn301%2Fmode%2F1up&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFRichards1998" class="citation cs2">Richards, E.G. (1998), <span class="id-lock-registration" title="Free registration required"><a rel="nofollow" class="external text" href="https://archive.org/details/mappingtimecalen00rich"><i>Mapping Time, the calendar and its history</i></a></span>, Oxford University Press, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-19-850413-9" title="Special:BookSources/978-0-19-850413-9"><bdi>978-0-19-850413-9</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Mapping+Time%2C+the+calendar+and+its+history&amp;rft.pub=Oxford+University+Press&amp;rft.date=1998&amp;rft.isbn=978-0-19-850413-9&amp;rft.aulast=Richards&amp;rft.aufirst=E.G.&amp;rft_id=https%3A%2F%2Farchive.org%2Fdetails%2Fmappingtimecalen00rich&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFRose1999" class="citation cs2">Rose, Lynn E. (1999), <i>Sun, Moon, and Sothis</i>, Kronos Press, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-917994-15-9" title="Special:BookSources/978-0-917994-15-9"><bdi>978-0-917994-15-9</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Sun%2C+Moon%2C+and+Sothis&amp;rft.pub=Kronos+Press&amp;rft.date=1999&amp;rft.isbn=978-0-917994-15-9&amp;rft.aulast=Rose&amp;rft.aufirst=Lynn+E.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSchuh1973" class="citation cs2 cs1-prop-foreign-lang-source">Schuh, Dieter (1973), <i>Untersuchungen zur Geschichte der Tibetischen Kalenderrechnung</i> (in German), Wiesbaden: Franz Steiner Verlag, <a href="/wiki/OCLC_(identifier)" class="mw-redirect" title="OCLC (identifier)">OCLC</a>&#160;<a rel="nofollow" class="external text" href="https://search.worldcat.org/oclc/1150484">1150484</a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Untersuchungen+zur+Geschichte+der+Tibetischen+Kalenderrechnung&amp;rft.place=Wiesbaden&amp;rft.pub=Franz+Steiner+Verlag&amp;rft.date=1973&amp;rft_id=info%3Aoclcnum%2F1150484&amp;rft.aulast=Schuh&amp;rft.aufirst=Dieter&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSpier1986" class="citation cs2">Spier, Arthur (1986), <i>The Comprehensive Hebrew Calendar</i>, Feldheim Publishers, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-87306-398-2" title="Special:BookSources/978-0-87306-398-2"><bdi>978-0-87306-398-2</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Comprehensive+Hebrew+Calendar&amp;rft.pub=Feldheim+Publishers&amp;rft.date=1986&amp;rft.isbn=978-0-87306-398-2&amp;rft.aulast=Spier&amp;rft.aufirst=Arthur&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFZerubavel1985" class="citation cs2">Zerubavel, Eviatar (1985), <i>The Seven Day Circle: The History and Meaning of the Week</i>, University of Chicago Press, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-226-98165-9" title="Special:BookSources/978-0-226-98165-9"><bdi>978-0-226-98165-9</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Seven+Day+Circle%3A+The+History+and+Meaning+of+the+Week&amp;rft.pub=University+of+Chicago+Press&amp;rft.date=1985&amp;rft.isbn=978-0-226-98165-9&amp;rft.aulast=Zerubavel&amp;rft.aufirst=Eviatar&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li></ul> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=22" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFraser1987" class="citation cs2">Fraser, Julius Thomas (1987), <i>Time, the Familiar Stranger</i> (illustrated&#160;ed.), Amherst: Univ of Massachusetts Press, <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1988tfs..book.....F">1988tfs..book.....F</a>, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-87023-576-4" title="Special:BookSources/978-0-87023-576-4"><bdi>978-0-87023-576-4</bdi></a>, <a href="/wiki/OCLC_(identifier)" class="mw-redirect" title="OCLC (identifier)">OCLC</a>&#160;<a rel="nofollow" class="external text" href="https://search.worldcat.org/oclc/15790499">15790499</a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Time%2C+the+Familiar+Stranger&amp;rft.place=Amherst&amp;rft.edition=illustrated&amp;rft.pub=Univ+of+Massachusetts+Press&amp;rft.date=1987&amp;rft_id=info%3Aoclcnum%2F15790499&amp;rft_id=info%3Abibcode%2F1988tfs..book.....F&amp;rft.isbn=978-0-87023-576-4&amp;rft.aulast=Fraser&amp;rft.aufirst=Julius+Thomas&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWhitrow2003" class="citation cs2">Whitrow, Gerald James (2003), <i>What is Time?</i>, Oxford: Oxford University Press, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-19-860781-6" title="Special:BookSources/978-0-19-860781-6"><bdi>978-0-19-860781-6</bdi></a>, <a href="/wiki/OCLC_(identifier)" class="mw-redirect" title="OCLC (identifier)">OCLC</a>&#160;<a rel="nofollow" class="external text" href="https://search.worldcat.org/oclc/265440481">265440481</a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=What+is+Time%3F&amp;rft.place=Oxford&amp;rft.pub=Oxford+University+Press&amp;rft.date=2003&amp;rft_id=info%3Aoclcnum%2F265440481&amp;rft.isbn=978-0-19-860781-6&amp;rft.aulast=Whitrow&amp;rft.aufirst=Gerald+James&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFC.K2003" class="citation cs2">C.K, Raju (2003), <i>The Eleven Pictures of Time</i>, SAGE Publications Pvt. Ltd, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-7619-9624-8" title="Special:BookSources/978-0-7619-9624-8"><bdi>978-0-7619-9624-8</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Eleven+Pictures+of+Time&amp;rft.pub=SAGE+Publications+Pvt.+Ltd&amp;rft.date=2003&amp;rft.isbn=978-0-7619-9624-8&amp;rft.aulast=C.K&amp;rft.aufirst=Raju&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFC.K1994" class="citation cs2">C.K, Raju (1994), <i>Time: Towards a Consistent Theory</i>, Springer, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-7923-3103-2" title="Special:BookSources/978-0-7923-3103-2"><bdi>978-0-7923-3103-2</bdi></a></cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Time%3A+Towards+a+Consistent+Theory&amp;rft.pub=Springer&amp;rft.date=1994&amp;rft.isbn=978-0-7923-3103-2&amp;rft.aulast=C.K&amp;rft.aufirst=Raju&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li></ul> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Calendar&amp;action=edit&amp;section=23" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><style data-mw-deduplicate="TemplateStyles:r1237033735">@media print{body.ns-0 .mw-parser-output .sistersitebox{display:none!important}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}</style><div class="side-box side-box-right plainlinks sistersitebox"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" decoding="async" width="30" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/45px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/59px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span></div> <div class="side-box-text plainlist">Wikimedia Commons has media related to <span style="font-weight: bold; font-style: italic;"><a href="https://commons.wikimedia.org/wiki/Category:Calendars" class="extiw" title="commons:Category:Calendars">Calendars</a></span>.</div></div> </div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1235681985"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1237033735"><div class="side-box side-box-right plainlinks sistersitebox"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/40px-Wiktionary-logo-en-v2.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/60px-Wiktionary-logo-en-v2.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/80px-Wiktionary-logo-en-v2.svg.png 2x" data-file-width="512" data-file-height="512" /></span></span></div> <div class="side-box-text plainlist">Look up <i><b><a href="https://en.wiktionary.org/wiki/calendar" class="extiw" title="wiktionary:calendar">calendar</a></b></i> in Wiktionary, the free dictionary.</div></div> </div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation encyclopaedia cs1"><span class="cs1-ws-icon" title="s:Encyclopædia Britannica, Ninth Edition/Calendar"><a class="external text" href="https://en.wikisource.org/wiki/Encyclop%C3%A6dia_Britannica,_Ninth_Edition/Calendar">"Calendar"&#160;</a></span>. <i><a href="/wiki/Encyclop%C3%A6dia_Britannica" title="Encyclopædia Britannica">Encyclopædia Britannica</a></i>. Vol.&#160;IV (9th&#160;ed.). 1878. pp.&#160;664–682.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Calendar&amp;rft.btitle=Encyclop%C3%A6dia+Britannica&amp;rft.pages=664-682&amp;rft.edition=9th&amp;rft.date=1878&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation encyclopaedia cs1"><span class="cs1-ws-icon" title="s:1911 Encyclopædia Britannica/Calendar"><a class="external text" href="https://en.wikisource.org/wiki/1911_Encyclop%C3%A6dia_Britannica/Calendar">"Calendar"&#160;</a></span>. <i><a href="/wiki/Encyclop%C3%A6dia_Britannica_Eleventh_Edition" title="Encyclopædia Britannica Eleventh Edition">Encyclopædia Britannica</a></i>. Vol.&#160;4 (11th&#160;ed.). 1911. p.&#160;987-1004.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Calendar&amp;rft.btitle=Encyclop%C3%A6dia+Britannica&amp;rft.pages=987-1004&amp;rft.edition=11th&amp;rft.date=1911&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation encyclopaedia cs1"><span class="cs1-ws-icon" title="s:The Encyclopedia Americana (1920)/Calendar"><a class="external text" href="https://en.wikisource.org/wiki/The_Encyclopedia_Americana_(1920)/Calendar">"Calendar"&#160;</a></span>. <i><a href="/wiki/Encyclopedia_Americana" title="Encyclopedia Americana">Encyclopedia Americana</a></i>. 1920.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Calendar&amp;rft.btitle=Encyclopedia+Americana&amp;rft.date=1920&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ACalendar" class="Z3988"></span></li> <li><a rel="nofollow" class="external text" href="http://www.fourmilab.ch/documents/calendar/">Calendar converter, including all major civil, religious and technical calendars.</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output 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tr+tr>.navbox-list{border-top:2px solid #fdfdfd}.mw-parser-output .navbox-title{background-color:#ccf}.mw-parser-output .navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Calendars" style="padding:3px"><table class="nowraplinks mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Calendars" title="Template:Calendars"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Calendars" title="Template talk:Calendars"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Calendars" title="Special:EditPage/Template:Calendars"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Calendars" style="font-size:114%;margin:0 4em"><a class="mw-selflink selflink">Calendars</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Systems</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Lunar_calendar" title="Lunar calendar">Lunar</a></li> <li><a href="/wiki/Lunisolar_calendar" title="Lunisolar calendar">Lunisolar</a></li> <li><a href="/wiki/Solar_calendar" title="Solar calendar">Solar</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">In wide use</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Astronomical_year_numbering" title="Astronomical year numbering">Astronomical</a></li> <li><a href="/wiki/Buddhist_calendar" title="Buddhist calendar">Buddhist</a></li> <li><a href="/wiki/Chinese_calendar" title="Chinese calendar">Chinese</a></li> <li><a href="/wiki/Ethiopian_calendar" title="Ethiopian calendar">Ethiopian</a></li> <li><a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian</a></li> <li><a href="/wiki/Hindu_calendar" title="Hindu calendar">Hindu</a></li> <li><a href="/wiki/Islamic_calendar" title="Islamic calendar">Lunar Hijri</a></li> <li><a href="/wiki/Solar_Hijri_calendar" title="Solar Hijri calendar">Solar Hijri</a></li> <li><a href="/wiki/ISO_week_date" title="ISO week date">ISO</a></li> <li><a href="/wiki/Unix_time" title="Unix time">Unix time</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">In more<br />limited use</div></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Akan_calendar" title="Akan calendar">Akan</a></li> <li><a href="/wiki/Armenian_calendar" title="Armenian calendar">Armenian</a></li> <li><a href="/wiki/Assamese_calendar" title="Assamese calendar">Assamese (Bhāshkarābda)</a></li> <li><a href="/wiki/Assyrian_calendar" title="Assyrian calendar">Assyrian</a></li> <li><a href="/wiki/Bah%C3%A1%CA%BC%C3%AD_calendar" title="Baháʼí calendar">Baháʼí</a> <ul><li>Badí‘</li></ul></li> <li>Bali <ul><li><a href="/wiki/Pawukon_calendar" title="Pawukon calendar">Pawukon</a></li> <li><a href="/wiki/Balinese_saka_calendar" title="Balinese saka calendar">Saka</a></li></ul></li> <li><a href="/wiki/Bengali_calendars" title="Bengali calendars">Bengali</a> <ul><li><a href="/wiki/Bangladeshi_calendar" class="mw-redirect" title="Bangladeshi calendar">Bangladeshi</a></li></ul></li> <li><a href="/wiki/Berber_calendar" title="Berber calendar">Berber</a></li> <li><a href="/wiki/Borana_calendar" title="Borana calendar">Borana</a></li> <li><a href="/wiki/Burmese_calendar" title="Burmese calendar">Burmese</a></li> <li><a href="/wiki/Chinese_calendar" title="Chinese calendar">Chinese</a> <ul><li><a href="/wiki/Earthly_Branches" title="Earthly Branches">Earthly Branches</a></li> <li><a href="/wiki/Heavenly_Stems" title="Heavenly Stems">Heavenly Stems</a></li> <li><a href="/wiki/Republic_of_China_calendar" title="Republic of China calendar">Minguo</a></li> <li><a href="/wiki/Solar_term" title="Solar term">Solar term</a></li></ul></li> <li><a href="/wiki/Heathen_holidays" title="Heathen holidays">Germanic heathen</a></li> <li><a href="/wiki/Georgian_calendar" title="Georgian calendar">Georgian</a></li> <li><a href="/wiki/Hebrew_calendar" title="Hebrew calendar">Hebrew</a></li> <li><a href="/wiki/Hindu_calendar" title="Hindu calendar">Hindu</a> <ul><li><a href="/wiki/Vikram_Samvat" title="Vikram Samvat">Vikram Samvat</a></li> <li><a href="/wiki/Indian_national_calendar" title="Indian national calendar">Saka</a></li></ul></li> <li><a href="/wiki/Hmong_calendar" title="Hmong calendar">Hmong</a></li> <li><a href="/wiki/Igbo_calendar" title="Igbo calendar">Igbo</a></li> <li><a href="/wiki/Iranian_calendars" title="Iranian calendars">Iranian</a> <ul><li><a href="/wiki/Jalali_calendar" title="Jalali calendar">Jalali</a> <ul><li>medieval</li></ul></li> <li><a href="/wiki/Zoroastrian_calendar" title="Zoroastrian calendar">Zoroastrian</a></li></ul></li> <li><a href="/wiki/Irish_calendar" title="Irish calendar">Irish</a> <ul><li>Gaelic</li></ul></li> <li><a href="/wiki/Islamic_calendar" title="Islamic calendar">Islamic</a> <ul><li><a href="/wiki/Fasli_calendar" title="Fasli calendar">Fasli</a></li> <li><a href="/wiki/Tabular_Islamic_calendar" title="Tabular Islamic calendar">Tabular</a></li></ul></li> <li><a href="/wiki/Vira_Nirvana_Samvat" title="Vira Nirvana Samvat">Jain</a></li> <li><a href="/wiki/Japanese_calendar" title="Japanese calendar">Japanese</a></li> <li><a href="/wiki/Javanese_calendar" title="Javanese calendar">Javanese</a></li> <li><a href="/wiki/Korean_calendar" title="Korean calendar">Korean</a> <ul><li><a href="/wiki/Juche_calendar" title="Juche calendar">Juche</a></li></ul></li> <li><a href="/wiki/Kurdish_calendar" title="Kurdish calendar">Kurdish</a></li> <li><a href="/wiki/Lithuanian_calendar" title="Lithuanian calendar">Lithuanian</a></li> <li><a href="/wiki/Tirhuta_Panchang" title="Tirhuta Panchang">Maithili</a></li> <li><a href="/wiki/Malayalam_calendar" title="Malayalam calendar">Malayalam</a></li> <li><a href="/wiki/Mandaean_calendar" title="Mandaean calendar">Mandaean</a></li> <li><a href="/wiki/Meitei_calendar" title="Meitei calendar">Manipuri (Meitei)</a></li> <li><a href="/wiki/Melanau_calendar" title="Melanau calendar">Melanau</a></li> <li><a href="/wiki/Mongolian_calendar" title="Mongolian calendar">Mongolian</a></li> <li>Nepal <ul><li><a href="/wiki/Nepal_Sambat" title="Nepal Sambat">Nepal Sambat</a></li> <li><a href="/wiki/Vikram_Samvat" title="Vikram Samvat">Vikram Samvat</a></li> <li><a href="/wiki/Yele_Sambat" title="Yele Sambat">Yele Sambat</a></li></ul></li> <li><a href="/wiki/Nisga%27a#Nisga’a_calendar/life" title="Nisga&#39;a">Nisg̱a'a</a></li> <li><a href="/wiki/Odia_calendar" title="Odia calendar">Odia</a></li> <li><a href="/wiki/Punjabi_calendar" title="Punjabi calendar">Punjabi</a> <ul><li><a href="/wiki/Nanakshahi_calendar" title="Nanakshahi calendar">Nanakshahi</a></li></ul></li> <li><a href="/wiki/Romanian_calendar" title="Romanian calendar">Romanian</a></li> <li><a href="/wiki/Shona_calendar" title="Shona calendar">Shona</a></li> <li><a href="/wiki/Somali_calendar" title="Somali calendar">Somali</a></li> <li><a href="/wiki/Sotho_calendar" title="Sotho calendar">Sesotho</a></li> <li><a href="/wiki/Slavic_calendar" title="Slavic calendar">Slavic</a> <ul><li><a href="/wiki/Slavic_Native_Faith%27s_calendars_and_holidays" title="Slavic Native Faith&#39;s calendars and holidays">Slavic Native Faith</a></li> <li><a href="/wiki/Macedonian_months" title="Macedonian months">Macedonian</a></li></ul></li> <li><a href="/wiki/Tamil_calendar" title="Tamil calendar">Tamil</a></li> <li><a href="/wiki/Thai_calendar" title="Thai calendar">Thai</a> <ul><li><a href="/wiki/Thai_lunar_calendar" title="Thai lunar calendar">lunar</a></li> <li><a href="/wiki/Thai_solar_calendar" title="Thai solar calendar">solar</a></li></ul></li> <li><a href="/wiki/Tibetan_calendar" title="Tibetan calendar">Tibetan</a></li> <li><a href="/wiki/Tripuri_calendar" title="Tripuri calendar">Tripuri</a></li> <li><a href="/wiki/Tulu_calendar" title="Tulu calendar">Tulu</a></li> <li><a href="/wiki/Vietnamese_calendar" title="Vietnamese calendar">Vietnamese</a></li> <li><a href="/wiki/Wheel_of_the_Year" title="Wheel of the Year">Wicca</a></li> <li><a href="/wiki/Xhosa_calendar" title="Xhosa calendar">Xhosa</a></li> <li><a href="/wiki/Yoruba_calendar" title="Yoruba calendar">Yoruba</a></li> <li><a href="/wiki/Zulu_calendar" title="Zulu calendar">Zulu</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;">Types</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Runic_calendar" title="Runic calendar">Runic</a></li> <li><a href="/wiki/Mesoamerican_calendars" title="Mesoamerican calendars">Mesoamerican</a> <ul><li><a href="/wiki/Mesoamerican_Long_Count_calendar" title="Mesoamerican Long Count calendar">Long Count</a></li> <li><a href="/wiki/Calendar_round" class="mw-redirect" title="Calendar round">Calendar round</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;">Christian variants</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Coptic_calendar" title="Coptic calendar">Coptic</a></li> <li><a href="/wiki/Ethiopian_calendar" title="Ethiopian calendar">Ethiopian and Eritrean</a></li> <li><a href="/wiki/Julian_calendar" title="Julian calendar">Julian</a> <ul><li><a href="/wiki/Revised_Julian_calendar" title="Revised Julian calendar">Revised</a></li></ul></li> <li><a href="/wiki/Liturgical_year" title="Liturgical year">Liturgical year</a> <ul><li><a href="/wiki/Eastern_Orthodox_liturgical_calendar" title="Eastern Orthodox liturgical calendar">Eastern Orthodox</a></li></ul></li> <li><a href="/wiki/Calendar_of_saints" title="Calendar of saints">Saints</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Historical</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pre-Islamic_Arabian_calendar" title="Pre-Islamic Arabian calendar">Arabian</a></li> <li><a href="/wiki/Attic_calendar" title="Attic calendar">Attic</a></li> <li><a href="/wiki/Aztec_calendar" title="Aztec calendar">Aztec</a> <ul><li><a href="/wiki/T%C5%8Dnalp%C5%8Dhualli" title="Tōnalpōhualli">Tōnalpōhualli</a></li> <li><a href="/wiki/Xiuhp%C5%8Dhualli" title="Xiuhpōhualli">Xiuhpōhualli</a></li></ul></li> <li><a href="/wiki/Babylonian_calendar" title="Babylonian calendar">Babylonian</a></li> <li><a href="/wiki/Bulgar_calendar" title="Bulgar calendar">Bulgar</a></li> <li><a href="/wiki/Byzantine_calendar" title="Byzantine calendar">Byzantine</a></li> <li><a href="/wiki/Cappadocian_calendar" title="Cappadocian calendar">Cappadocian</a></li> <li><a href="/wiki/Celtic_calendar" title="Celtic calendar">Celtic</a></li> <li><a href="/wiki/Cham_calendar" title="Cham calendar">Cham</a></li> <li><a href="/wiki/Chula_Sakarat" title="Chula Sakarat">Culāsakaraj</a></li> <li><a href="/wiki/Coligny_calendar" title="Coligny calendar">Coligny</a></li> <li><a href="/wiki/Egyptian_calendar" title="Egyptian calendar">Egyptian</a></li> <li><a href="/wiki/Enoch_calendar" title="Enoch calendar">Enoch</a></li> <li><a href="/wiki/Florentine_calendar" title="Florentine calendar">Florentine</a></li> <li><a href="/wiki/French_Republican_calendar" title="French Republican calendar">French Republican</a></li> <li><a href="/wiki/Germanic_calendar" class="mw-redirect" title="Germanic calendar">Germanic</a></li> <li><a href="/wiki/Ancient_Greek_calendars" title="Ancient Greek calendars">Greek</a></li> <li><a href="/wiki/Hindu_calendar" title="Hindu calendar">Hindu</a></li> <li><a href="/wiki/Inca_calendar" class="mw-redirect" title="Inca calendar">Inca</a></li> <li><a href="/wiki/Ancient_Macedonian_calendar" title="Ancient Macedonian calendar">Macedonian</a></li> <li><a href="/wiki/Maya_calendar" title="Maya calendar">Maya</a> <ul><li><a href="/wiki/Haab%CA%BC" title="Haabʼ">Haabʼ</a></li> <li><a href="/wiki/Tzolk%CA%BCin" title="Tzolkʼin">Tzolkʼin</a></li></ul></li> <li><a href="/wiki/Muisca_calendar" title="Muisca calendar">Muisca</a></li> <li><a href="/wiki/Pentecontad_calendar" title="Pentecontad calendar">Pentecontad</a></li> <li><a href="/wiki/Pisan_calendar" title="Pisan calendar">Pisan</a></li> <li><a href="/wiki/Qumran_calendrical_texts" title="Qumran calendrical texts">Qumran</a></li> <li><a href="/wiki/Rapa_Nui_calendar" title="Rapa Nui calendar">Rapa Nui</a></li> <li><a href="/wiki/Roman_calendar" title="Roman calendar">Roman</a></li> <li><a href="/wiki/Rumi_calendar" title="Rumi calendar"><i>Rumi</i></a></li> <li><a href="/wiki/Sexagenary_cycle" title="Sexagenary cycle">Sexagenary</a></li> <li><a href="/wiki/Soviet_calendar" title="Soviet calendar">Soviet</a></li> <li><a href="/wiki/Swedish_calendar" title="Swedish calendar">Swedish</a></li> <li><a href="/wiki/2002_renaming_of_Turkmen_months_and_days_of_week" title="2002 renaming of Turkmen months and days of week">Turkmen</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">By specialty</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Holocene_calendar" title="Holocene calendar">Holocene</a> <ul><li>anthropological</li></ul></li> <li><a href="/wiki/Proleptic_Gregorian_calendar" title="Proleptic Gregorian calendar">Proleptic Gregorian</a>&#160;/&#32;<a href="/wiki/Proleptic_Julian_calendar" title="Proleptic Julian calendar">Proleptic Julian</a> <ul><li>historiographical</li></ul></li> <li><a href="/wiki/Darian_calendar" title="Darian calendar">Darian</a> <ul><li>Martian</li></ul></li> <li><a href="/wiki/Dreamspell" title="Dreamspell">Dreamspell</a> <ul><li>New Age</li></ul></li> <li><a href="/wiki/Discordian_calendar" title="Discordian calendar">Discordian</a></li> <li><a href="/wiki/%27Pataphysics#Pataphysical_calendar" title="&#39;Pataphysics">'Pataphysical</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Calendar_reform" title="Calendar reform">Reform proposals</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Hanke%E2%80%93Henry_Permanent_Calendar" title="Hanke–Henry Permanent Calendar">Hanke–Henry Permanent</a></li> <li><a href="/wiki/International_Fixed_Calendar" title="International Fixed Calendar">International Fixed</a></li> <li><a href="/wiki/Pax_Calendar" title="Pax Calendar">Pax</a></li> <li><a href="/wiki/Positivist_calendar" title="Positivist calendar">Positivist</a></li> <li><a href="/wiki/Symmetry454" title="Symmetry454">Symmetry454</a></li> <li><a href="/wiki/World_Calendar" title="World Calendar">World</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Displays and<br />applications</div></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Calendaring_software" class="mw-redirect" title="Calendaring software">Electronic</a></li> <li><a href="/wiki/Perpetual_calendar" title="Perpetual calendar">Perpetual</a></li> <li><a href="/wiki/Calendar_(stationery)" title="Calendar (stationery)">Wall</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Year naming<br />and numbering</div></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;">Terminology</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Calendar_era" title="Calendar era">Era</a></li> <li><a href="/wiki/Epoch" title="Epoch">Epoch</a></li> <li><a href="/wiki/Leap_year" title="Leap year">Leap year</a></li> <li><a href="/wiki/New_Year" title="New Year">New Year</a></li> <li><a href="/wiki/Regnal_name" title="Regnal name">Regnal name</a></li> <li><a href="/wiki/Regnal_year" title="Regnal year">Regnal year</a></li> <li><a href="/wiki/Year_zero" title="Year zero">Year zero</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;font-weight:normal;">Systems</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ab_urbe_condita" title="Ab urbe condita">Ab urbe condita</a></li> <li><a href="/wiki/Anka_year" title="Anka year">Anka year</a></li> <li><a href="/wiki/Anno_Domini" title="Anno Domini">Anno Domini</a>/<a href="/wiki/Common_Era" title="Common Era">Common Era</a></li> <li><a href="/wiki/Anno_Lucis" title="Anno Lucis">Anno Lucis</a></li> <li><a href="/wiki/Era_of_the_Martyrs" title="Era of the Martyrs">Anno Martyrum</a></li> <li><a href="/wiki/Anno_Mundi" title="Anno Mundi">Anno Mundi</a></li> <li><a href="/wiki/Eponym_dating_system" title="Eponym dating system">Assyrian</a></li> <li><a href="/wiki/Before_Present" title="Before Present">Before Present</a></li> <li><a href="/wiki/Chinese_era_name" title="Chinese era name">Chinese Imperial</a></li> <li><a href="/wiki/Republic_of_China_calendar" title="Republic of China calendar">Chinese Minguo</a></li> <li><a href="/wiki/Regnal_years_of_English_and_British_monarchs" title="Regnal years of English and British monarchs">English and British regnal year</a></li> <li><a href="/wiki/Hijri_year" title="Hijri year">Hijri year</a></li> <li><a href="/wiki/Holocene_calendar" title="Holocene calendar">Human (Holocene)</a></li> <li><a href="/wiki/Japanese_era_name" title="Japanese era name">Japanese</a></li> <li><a href="/wiki/Korean_era_name" title="Korean era name">Korean</a></li> <li><a href="/wiki/Nirayana_system" title="Nirayana system">Nirayana system</a></li> <li><a href="/wiki/Seleucid_era" title="Seleucid era">Seleucid</a></li> <li><a href="/wiki/Spanish_era" title="Spanish era">Spanish</a></li> <li><a href="/wiki/Yuga" title="Yuga">Yugas</a> <ul><li><a href="/wiki/Satya_Yuga" title="Satya Yuga">Satya</a></li> <li><a href="/wiki/Treta_Yuga" title="Treta Yuga">Treta</a></li> <li><a href="/wiki/Dvapara_Yuga" title="Dvapara Yuga">Dvapara</a></li> <li><a href="/wiki/Kali_Yuga" title="Kali Yuga">Kali</a></li></ul></li> <li><a href="/wiki/Vietnamese_era_name" title="Vietnamese era name">Vietnamese</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Fictional</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Discworld_(world)#Calendar" title="Discworld (world)">Discworld</a> (<i><a href="/wiki/Discworld" title="Discworld">Discworld</a></i>)</li> <li><a href="/wiki/Flanaess#Calendar" class="mw-redirect" title="Flanaess">Greyhawk</a> (<i><a href="/wiki/Dungeons_%26_Dragons" title="Dungeons &amp; Dragons">Dungeons &amp; Dragons</a></i>)</li> <li><a href="/wiki/Middle-earth_calendar" class="mw-redirect" title="Middle-earth calendar">Middle-earth</a> (<i><a href="/wiki/The_Lord_of_the_Rings" title="The Lord of the Rings">The Lord of the Rings</a></i>)</li> <li><a href="/wiki/Stardate" title="Stardate">Stardate</a> (<i><a href="/wiki/Star_Trek" title="Star Trek">Star Trek</a></i>)</li></ul> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="List-Class article"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/16px-Symbol_list_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/23px-Symbol_list_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/31px-Symbol_list_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/List_of_calendars" title="List of calendars">List of calendars</a></li> <li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Calendars" title="Category:Calendars">Category</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"></div><div role="navigation" class="navbox" aria-labelledby="Time" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Time_topics" title="Template:Time topics"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Time_topics" title="Template talk:Time topics"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Time_topics" title="Special:EditPage/Template:Time topics"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Time" style="font-size:114%;margin:0 4em"><a href="/wiki/Time" title="Time">Time</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Key concepts</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Past" title="Past">Past</a></li> <li><a href="/wiki/Present" title="Present">Present</a></li> <li><a href="/wiki/Future" title="Future">Future</a></li> <li><a href="/wiki/Eternity" title="Eternity">Eternity</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Horology" class="mw-redirect" title="Horology">Measurement</a><br />and <a href="/wiki/Time_standard" title="Time standard">standards</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:6.5em;font-weight:normal; text-align:center;"><a href="/wiki/Chronometry" title="Chronometry">Chronometry</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Coordinated_Universal_Time" title="Coordinated Universal Time">UTC</a></li> <li><a href="/wiki/Universal_Time" title="Universal Time">UT</a></li> <li><a href="/wiki/International_Atomic_Time" title="International Atomic Time">TAI</a></li> <li><a href="/wiki/Unit_of_time" title="Unit of time">Unit of time</a></li> <li><a href="/wiki/Orders_of_magnitude_(time)" title="Orders of magnitude (time)">Orders of magnitude (time)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6.5em;font-weight:normal; text-align:center;"><a href="/wiki/System_of_measurement" class="mw-redirect" title="System of measurement">Measurement<br />systems</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Italian_six-hour_clock" title="Italian six-hour clock">Italian six-hour clock</a></li> <li><a href="/wiki/Thai_six-hour_clock" title="Thai six-hour clock">Thai six-hour clock</a></li> <li><a href="/wiki/12-hour_clock" title="12-hour clock">12-hour clock</a></li> <li><a href="/wiki/24-hour_clock" title="24-hour clock">24-hour clock</a></li> <li><a href="/wiki/Relative_hour" title="Relative hour">Relative hour</a></li> <li><a href="/wiki/Daylight_saving_time" title="Daylight saving time">Daylight saving time</a></li> <li><a href="/wiki/Traditional_Chinese_timekeeping" title="Traditional Chinese timekeeping">Chinese</a></li> <li><a href="/wiki/Decimal_time" title="Decimal time">Decimal</a></li> <li><a href="/wiki/Hexadecimal_time" title="Hexadecimal time">Hexadecimal</a></li> <li><a href="/wiki/Hindu_units_of_time" title="Hindu units of time">Hindu</a></li> <li><a href="/wiki/Metric_time" title="Metric time">Metric</a></li> <li><a href="/wiki/Roman_timekeeping" title="Roman timekeeping">Roman</a></li> <li><a href="/wiki/Sidereal_time" title="Sidereal time">Sidereal</a></li> <li><a href="/wiki/Solar_time" title="Solar time">Solar</a></li> <li><a href="/wiki/Time_zone" title="Time zone">Time zone</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6.5em;font-weight:normal; text-align:center;"><a class="mw-selflink selflink">Calendars</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a class="mw-selflink-fragment" href="#Systems">Main types</a> <ul><li><a href="/wiki/Solar_calendar" title="Solar calendar">Solar</a></li> <li><a href="/wiki/Lunar_calendar" title="Lunar calendar">Lunar</a></li> <li><a href="/wiki/Lunisolar_calendar" title="Lunisolar calendar">Lunisolar</a></li></ul></li> <li><a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian</a></li> <li><a href="/wiki/Julian_calendar" title="Julian calendar">Julian</a></li> <li><a href="/wiki/Hebrew_calendar" title="Hebrew calendar">Hebrew</a></li> <li><a href="/wiki/Islamic_calendar" title="Islamic calendar">Islamic</a></li> <li><a href="/wiki/Solar_Hijri_calendar" title="Solar Hijri calendar">Solar Hijri</a></li> <li><a href="/wiki/Chinese_calendar" title="Chinese calendar">Chinese</a></li> <li><a href="/wiki/Hindu_calendar" title="Hindu calendar">Hindu Panchang</a></li> <li><a href="/wiki/Maya_calendar" title="Maya calendar">Maya</a></li> <li><i><a href="/wiki/List_of_calendars" title="List of calendars">List</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6.5em;font-weight:normal; text-align:center;"><a href="/wiki/Clock" title="Clock">Clocks</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Clock#Types" title="Clock">Main types</a> <ul><li><a href="/wiki/Astronomical_clock" title="Astronomical clock">astronomical</a> <ul><li><a href="/wiki/Astrarium" title="Astrarium">astrarium</a></li></ul></li> <li><a href="/wiki/Atomic_clock" title="Atomic clock">atomic</a> <ul><li><a href="/wiki/Quantum_clock" class="mw-redirect" title="Quantum clock">quantum</a></li></ul></li> <li><a href="/wiki/Hourglass" title="Hourglass">hourglass</a></li> <li><a href="/wiki/Marine_chronometer" title="Marine chronometer">marine</a></li> <li><a href="/wiki/Sundial" title="Sundial">sundial</a></li> <li><a href="/wiki/Watch" title="Watch">watch</a> <ul><li><a href="/wiki/Mechanical_watch" title="Mechanical watch">mechanical</a></li> <li><a href="/wiki/Stopwatch" title="Stopwatch">stopwatch</a></li></ul></li> <li><a href="/wiki/Water_clock" title="Water clock">water-based</a></li></ul></li> <li><a href="/wiki/Cuckoo_clock" title="Cuckoo clock">Cuckoo clock</a></li> <li><a href="/wiki/Digital_clock" title="Digital clock">Digital clock</a></li> <li><a href="/wiki/Grandfather_clock" title="Grandfather clock">Grandfather clock</a></li> <li><i><a href="/wiki/History_of_timekeeping_devices" title="History of timekeeping devices">History</a></i> <ul><li><i><a href="/wiki/Timeline_of_time_measurement_inventions" title="Timeline of time measurement inventions">Timeline</a></i></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div class="hlist"><ul><li><a href="/wiki/Chronology" title="Chronology">Chronology</a></li><li><a href="/wiki/History" title="History">History</a></li></ul></div></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Astronomical_chronology" title="Astronomical chronology">Astronomical chronology</a></li> <li><a href="/wiki/Big_History" title="Big History">Big History</a></li> <li><a href="/wiki/Calendar_era" title="Calendar era">Calendar era</a></li> <li><a href="/wiki/Deep_time" title="Deep time">Deep time</a></li> <li><a href="/wiki/Periodization" title="Periodization">Periodization</a></li> <li><a href="/wiki/Regnal_year" title="Regnal year">Regnal year</a></li> <li><a href="/wiki/Timeline" title="Timeline">Timeline</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Philosophy_of_space_and_time" title="Philosophy of space and time">Philosophy of time</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/A_series_and_B_series" title="A series and B series">A series and B series</a></li> <li><a href="/wiki/B-theory_of_time" title="B-theory of time">B-theory of time</a></li> <li><a href="/wiki/Chronocentrism" title="Chronocentrism">Chronocentrism</a></li> <li><a href="/wiki/Duration_(philosophy)" title="Duration (philosophy)">Duration</a></li> <li><a href="/wiki/Endurantism" title="Endurantism">Endurantism</a></li> <li><a href="/wiki/Eternal_return" title="Eternal return">Eternal return</a></li> <li><a href="/wiki/Eternalism_(philosophy_of_time)" title="Eternalism (philosophy of time)">Eternalism</a></li> <li><a href="/wiki/Event_(philosophy)" title="Event (philosophy)">Event</a></li> <li><a href="/wiki/Perdurantism" title="Perdurantism">Perdurantism</a></li> <li><a href="/wiki/Philosophical_presentism" title="Philosophical presentism">Presentism</a></li> <li><a href="/wiki/Temporal_finitism" title="Temporal finitism">Temporal finitism</a></li> <li><a href="/wiki/Temporal_parts" title="Temporal parts">Temporal parts</a></li> <li><i><a href="/wiki/The_Unreality_of_Time" title="The Unreality of Time">The Unreality of Time</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div class="hlist"><ul><li><a href="/wiki/Category:Time_in_religion" title="Category:Time in religion">Religion</a></li><li><a href="/wiki/Template:Time_in_religion_and_mythology" title="Template:Time in religion and mythology">Mythology</a></li></ul></div></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ages_of_Man" title="Ages of Man">Ages of Man</a></li> <li><a href="/wiki/Destiny" title="Destiny">Destiny</a></li> <li><a href="/wiki/Immortality" title="Immortality">Immortality</a></li> <li><a href="/wiki/The_Dreaming" title="The Dreaming">Dreamtime</a></li> <li><a href="/wiki/K%C4%81la" title="Kāla">Kāla</a></li> <li><a href="/wiki/Time_and_fate_deities" title="Time and fate deities">Time and fate deities</a> <ul><li><a href="/wiki/Father_Time" title="Father Time">Father Time</a></li></ul></li> <li><a href="/wiki/Wheel_of_time" title="Wheel of time">Wheel of time</a> <ul><li><a href="/wiki/Kalachakra" title="Kalachakra">Kalachakra</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Time_perception" title="Time perception">Human experience</a><br />and <a href="/wiki/Time-use_research" title="Time-use research">use of time</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chronemics" title="Chronemics">Chronemics</a></li> <li><a href="/wiki/Generation_time" title="Generation time">Generation time</a></li> <li><a href="/wiki/Mental_chronometry" title="Mental chronometry">Mental chronometry</a></li> <li><a href="/wiki/Duration_(music)" title="Duration (music)">Music</a> <ul><li><a href="/wiki/Tempo" title="Tempo">tempo</a></li> <li><a href="/wiki/Time_signature" title="Time signature">time signature</a></li></ul></li> <li><a href="/wiki/Rosy_retrospection" title="Rosy retrospection">Rosy retrospection</a></li> <li><a href="/wiki/Tense%E2%80%93aspect%E2%80%93mood" title="Tense–aspect–mood">Tense–aspect–mood</a></li> <li><a href="/wiki/Time_management" title="Time management">Time management</a></li> <li><a href="/wiki/Yesterday_(time)" title="Yesterday (time)">Yesterday</a> – <a href="/wiki/Present" title="Present">Today</a> – <a href="/wiki/Tomorrow_(time)" title="Tomorrow (time)">Tomorrow</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Time in <a href="/wiki/Science" title="Science">science</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:6.5em;font-weight:normal; text-align:center;"><a href="/wiki/Geology" title="Geology">Geology</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Geologic_time_scale" title="Geologic time scale">Geological time</a> <ul><li><a href="/wiki/Age_(geology)" class="mw-redirect" title="Age (geology)">age</a></li> <li><a href="/wiki/Chronozone" title="Chronozone">chron</a></li> <li><a href="/wiki/Eon_(geology)" class="mw-redirect" title="Eon (geology)">eon</a></li> <li><a href="/wiki/Epoch_(geology)" class="mw-redirect" title="Epoch (geology)">epoch</a></li> <li><a href="/wiki/Era_(geology)" class="mw-redirect" title="Era (geology)">era</a></li> <li><a href="/wiki/Geological_period" class="mw-redirect" title="Geological period">period</a></li></ul></li> <li><a href="/wiki/Geochronology" title="Geochronology">Geochronology</a></li> <li><a href="/wiki/Geological_history_of_Earth" title="Geological history of Earth">Geological history of Earth</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6.5em;font-weight:normal; text-align:center;"><a href="/wiki/Time_in_physics" title="Time in physics">Physics</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Absolute_space_and_time" title="Absolute space and time">Absolute space and time</a></li> <li><a href="/wiki/Arrow_of_time" title="Arrow of time">Arrow of time</a></li> <li><a href="/wiki/Chronon" title="Chronon">Chronon</a></li> <li><a href="/wiki/Coordinate_time" title="Coordinate time">Coordinate time</a></li> <li><a href="/wiki/Instant" title="Instant">Instant</a></li> <li><a href="/wiki/Proper_time" title="Proper time">Proper time</a></li> <li><a href="/wiki/Spacetime" title="Spacetime">Spacetime</a></li> <li><a href="/wiki/Theory_of_relativity" title="Theory of relativity">Theory of relativity</a></li> <li><a href="/wiki/Time_domain" title="Time domain">Time domain</a></li> <li><a href="/wiki/Time_translation_symmetry" class="mw-redirect" title="Time translation symmetry">Time translation symmetry</a></li> <li><a href="/wiki/T-symmetry" title="T-symmetry">Time reversal symmetry</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6.5em;font-weight:normal; text-align:center;">Other fields</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chronological_dating" title="Chronological dating">Chronological dating</a></li> <li><a href="/wiki/Chronobiology" title="Chronobiology">Chronobiology</a> <ul><li><a href="/wiki/Circadian_rhythm" title="Circadian rhythm">Circadian rhythms</a></li></ul></li> <li><a href="/wiki/Chemical_clock" title="Chemical clock">Clock reaction</a></li> <li><a href="/wiki/Glottochronology" title="Glottochronology">Glottochronology</a></li> <li><a href="/wiki/Time_geography" title="Time geography">Time geography</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Leap_year" title="Leap year">Leap year</a></li> <li><a href="/wiki/Memory" title="Memory">Memory</a></li> <li><a href="/wiki/Moment_(unit)" title="Moment (unit)">Moment</a></li> <li><a href="/wiki/Space" title="Space">Space</a></li> <li><a href="/wiki/System_time" title="System time">System time</a></li> <li><i><a href="/wiki/Tempus_fugit" title="Tempus fugit">Tempus fugit</a></i></li> <li><a href="/wiki/Time_capsule" title="Time capsule">Time capsule</a></li> <li><a href="/wiki/Time_immemorial" title="Time immemorial">Time immemorial</a></li> <li><a href="/wiki/Time_travel" title="Time travel">Time travel</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Time" title="Category:Time">Category</a></li> <li><span class="noviewer" typeof="mw:File"><span title="Commons page"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span> <a href="https://commons.wikimedia.org/wiki/Category:Time" class="extiw" title="commons:Category:Time">Commons</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Time_measurement_and_standards" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="3"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Time_measurement_and_standards" title="Template:Time measurement and standards"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Time_measurement_and_standards" title="Template talk:Time measurement and standards"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Time_measurement_and_standards" title="Special:EditPage/Template:Time measurement and standards"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Time_measurement_and_standards" style="font-size:114%;margin:0 4em"><a href="/wiki/Time" title="Time">Time measurement</a> and <a href="/wiki/Time_standard" title="Time standard">standards</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><a href="/wiki/Chronometry" title="Chronometry">Chronometry</a></li> <li><a href="/wiki/Orders_of_magnitude_(time)" title="Orders of magnitude (time)">Orders of magnitude</a></li> <li><a href="/wiki/Time_metrology" class="mw-redirect" title="Time metrology">Metrology</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">International standards</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Coordinated_Universal_Time" title="Coordinated Universal Time">Coordinated Universal Time</a> <ul><li><a href="/wiki/UTC_offset" title="UTC offset">offset</a></li></ul></li> <li><a href="/wiki/Universal_Time" title="Universal Time">UT</a></li> <li><a href="/wiki/%CE%94T_(timekeeping)" title="ΔT (timekeeping)">ΔT</a></li> <li><a href="/wiki/DUT1" title="DUT1">DUT1</a></li> <li><a href="/wiki/International_Earth_Rotation_and_Reference_Systems_Service" title="International Earth Rotation and Reference Systems Service">International Earth Rotation and Reference Systems Service</a></li> <li><a href="/wiki/ISO_31-1" title="ISO 31-1">ISO 31-1</a></li> <li><a href="/wiki/ISO_8601" title="ISO 8601">ISO 8601</a></li> <li><a href="/wiki/International_Atomic_Time" title="International Atomic Time">International Atomic Time</a></li> <li><a href="/wiki/12-hour_clock" title="12-hour clock">12-hour clock</a></li> <li><a href="/wiki/24-hour_clock" title="24-hour clock">24-hour clock</a></li> <li><a href="/wiki/Barycentric_Coordinate_Time" title="Barycentric Coordinate Time">Barycentric Coordinate Time</a></li> <li><a href="/wiki/Barycentric_Dynamical_Time" title="Barycentric Dynamical Time">Barycentric Dynamical Time</a></li> <li><a href="/wiki/Civil_time" title="Civil time">Civil time</a></li> <li><a href="/wiki/Daylight_saving_time" title="Daylight saving time">Daylight saving time</a></li> <li><a href="/wiki/Geocentric_Coordinate_Time" title="Geocentric Coordinate Time">Geocentric Coordinate Time</a></li> <li><a href="/wiki/International_Date_Line" title="International Date Line">International Date Line</a></li> <li><a href="/wiki/IERS_Reference_Meridian" title="IERS Reference Meridian">IERS Reference Meridian</a></li> <li><a href="/wiki/Leap_second" title="Leap second">Leap second</a></li> <li><a href="/wiki/Solar_time" title="Solar time">Solar time</a></li> <li><a href="/wiki/Terrestrial_Time" title="Terrestrial Time">Terrestrial Time</a></li> <li><a href="/wiki/Time_zone" title="Time zone">Time zone</a></li> <li><a href="/wiki/180th_meridian" title="180th meridian">180th meridian</a></li></ul> </div></td><td class="noviewer navbox-image" rowspan="9" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/Hourglass" title="Hourglass"><img alt="template illustration" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Marine_sandglass_MMM.jpg/75px-Marine_sandglass_MMM.jpg" decoding="async" width="75" height="175" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Marine_sandglass_MMM.jpg/113px-Marine_sandglass_MMM.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/70/Marine_sandglass_MMM.jpg/150px-Marine_sandglass_MMM.jpg 2x" data-file-width="1637" data-file-height="3819" /></a></span><br /><span typeof="mw:File"><a href="/wiki/Time_zone" title="Time zone"><img alt="template illustration" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png/75px-Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png" decoding="async" width="75" height="152" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png/113px-Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png/150px-Aleutian_Islands_with_180th_meridian_and_International_Date_Line_%28cropped%29.png 2x" data-file-width="496" data-file-height="1007" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Obsolete standards</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ephemeris_time" title="Ephemeris time">Ephemeris time</a></li> <li><a href="/wiki/Greenwich_Mean_Time" title="Greenwich Mean Time">Greenwich Mean Time</a></li> <li><a href="/wiki/Prime_meridian" title="Prime meridian">Prime meridian</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Time_in_physics" title="Time in physics">Time in physics</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Absolute_space_and_time" title="Absolute space and time">Absolute space and time</a></li> <li><a href="/wiki/Spacetime" title="Spacetime">Spacetime</a></li> <li><a href="/wiki/Chronon" title="Chronon">Chronon</a></li> <li><a href="/wiki/Continuous_signal" class="mw-redirect" title="Continuous signal">Continuous signal</a></li> <li><a href="/wiki/Coordinate_time" title="Coordinate time">Coordinate time</a></li> <li><a href="/wiki/Cosmological_decade" title="Cosmological decade">Cosmological decade</a></li> <li><a href="/wiki/Discrete_time_and_continuous_time" title="Discrete time and continuous time">Discrete time and continuous time</a></li> <li><a href="/wiki/Proper_time" title="Proper time">Proper time</a></li> <li><a href="/wiki/Theory_of_relativity" title="Theory of relativity">Theory of relativity</a></li> <li><a href="/wiki/Time_dilation" title="Time dilation">Time dilation</a></li> <li><a href="/wiki/Gravitational_time_dilation" title="Gravitational time dilation">Gravitational time dilation</a></li> <li><a href="/wiki/Time_domain" title="Time domain">Time domain</a></li> <li><a href="/wiki/Time-translation_symmetry" title="Time-translation symmetry">Time-translation symmetry</a></li> <li><a href="/wiki/T-symmetry" title="T-symmetry">T-symmetry</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Horology" class="mw-redirect" title="Horology">Horology</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Clock" title="Clock">Clock</a></li> <li><a href="/wiki/Astrarium" title="Astrarium">Astrarium</a></li> <li><a href="/wiki/Atomic_clock" title="Atomic clock">Atomic clock</a></li> <li><a href="/wiki/Complication_(horology)" title="Complication (horology)">Complication</a></li> <li><a href="/wiki/History_of_timekeeping_devices" title="History of timekeeping devices">History of timekeeping devices</a></li> <li><a href="/wiki/Hourglass" title="Hourglass">Hourglass</a></li> <li><a href="/wiki/Marine_chronometer" title="Marine chronometer">Marine chronometer</a></li> <li><a href="/wiki/Marine_sandglass" title="Marine sandglass">Marine sandglass</a></li> <li><a href="/wiki/Radio_clock" title="Radio clock">Radio clock</a></li> <li><a href="/wiki/Watch" title="Watch">Watch</a> <ul><li><a href="/wiki/Stopwatch" title="Stopwatch">stopwatch</a></li></ul></li> <li><a href="/wiki/Water_clock" title="Water clock">Water clock</a></li> <li><a href="/wiki/Sundial" title="Sundial">Sundial</a></li> <li><a href="/wiki/Dialing_scales" title="Dialing scales">Dialing scales</a></li> <li><a href="/wiki/Equation_of_time" title="Equation of time">Equation of time</a></li> <li><a href="/wiki/History_of_sundials" title="History of sundials">History of sundials</a></li> <li><a href="/wiki/Schema_for_horizontal_dials" title="Schema for horizontal dials">Sundial markup schema</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a class="mw-selflink selflink">Calendar</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian</a></li> <li><a href="/wiki/Hebrew_calendar" title="Hebrew calendar">Hebrew</a></li> <li><a href="/wiki/Hindu_calendar" title="Hindu calendar">Hindu</a></li> <li><a href="/wiki/Holocene_calendar" title="Holocene calendar">Holocene</a></li> <li><a href="/wiki/Islamic_calendar" title="Islamic calendar">Islamic</a> (lunar Hijri)</li> <li><a href="/wiki/Julian_calendar" title="Julian calendar">Julian</a></li> <li><a href="/wiki/Solar_Hijri_calendar" title="Solar Hijri calendar">Solar Hijri</a></li> <li><a href="/wiki/Astronomical_year_numbering" title="Astronomical year numbering">Astronomical</a></li> <li><a href="/wiki/Dominical_letter" title="Dominical letter">Dominical letter</a></li> <li><a href="/wiki/Epact" title="Epact">Epact</a></li> <li><a href="/wiki/Equinox" title="Equinox">Equinox</a></li> <li><a href="/wiki/Intercalation_(timekeeping)" title="Intercalation (timekeeping)">Intercalation</a></li> <li><a href="/wiki/Julian_day" title="Julian day">Julian day</a></li> <li><a href="/wiki/Leap_year" title="Leap year">Leap year</a></li> <li><a href="/wiki/Lunar_calendar" title="Lunar calendar">Lunar</a></li> <li><a href="/wiki/Lunisolar_calendar" title="Lunisolar calendar">Lunisolar</a></li> <li><a href="/wiki/Solar_calendar" title="Solar calendar">Solar</a></li> <li><a href="/wiki/Solstice" title="Solstice">Solstice</a></li> <li><a href="/wiki/Tropical_year" title="Tropical year">Tropical year</a></li> <li><a href="/wiki/Determination_of_the_day_of_the_week" title="Determination of the day of the week">Weekday determination</a></li> <li><a href="/wiki/Names_of_the_days_of_the_week" title="Names of the days of the week">Weekday names</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Archaeology and geology</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chronological_dating" title="Chronological dating">Chronological dating</a></li> <li><a href="/wiki/Geologic_time_scale" title="Geologic time scale">Geologic time scale</a></li> <li><a href="/wiki/International_Commission_on_Stratigraphy" title="International Commission on Stratigraphy">International Commission on Stratigraphy</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Astronomical_chronology" title="Astronomical chronology">Astronomical chronology</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Galactic_year" title="Galactic year">Galactic year</a></li> <li><a href="/wiki/Nuclear_timescale" title="Nuclear timescale">Nuclear timescale</a></li> <li><a href="/wiki/Precession" title="Precession">Precession</a></li> <li><a href="/wiki/Sidereal_time" title="Sidereal time">Sidereal time</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other <a href="/wiki/Unit_of_time" title="Unit of time">units of time</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Instant" title="Instant">Instant</a></li> <li><a href="/wiki/Flick_(time)" title="Flick (time)">Flick</a></li> <li><a href="/wiki/Shake_(unit)" title="Shake (unit)">Shake</a></li> <li><a href="/wiki/Jiffy_(time)" title="Jiffy (time)">Jiffy</a></li> <li><a href="/wiki/Second" title="Second">Second</a></li> <li><a href="/wiki/Minute" title="Minute">Minute</a></li> <li><a href="/wiki/Moment_(unit)" title="Moment (unit)">Moment</a></li> <li><a href="/wiki/Hour" title="Hour">Hour</a></li> <li><a href="/wiki/Day" title="Day">Day</a></li> <li><a href="/wiki/Week" title="Week">Week</a></li> <li><a href="/wiki/Fortnight" title="Fortnight">Fortnight</a></li> <li><a href="/wiki/Month" title="Month">Month</a></li> <li><a href="/wiki/Year" title="Year">Year</a></li> <li><a href="/wiki/Olympiad" title="Olympiad">Olympiad</a></li> <li><a href="/wiki/Lustrum" title="Lustrum">Lustrum</a></li> <li><a href="/wiki/Decade" title="Decade">Decade</a></li> <li><a href="/wiki/Century" title="Century">Century</a></li> <li><a href="/wiki/Saeculum" title="Saeculum">Saeculum</a></li> <li><a href="/wiki/Millennium" title="Millennium">Millennium</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related topics</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chronology" title="Chronology">Chronology</a></li> <li><a href="/wiki/Duration_(philosophy)" title="Duration (philosophy)">Duration</a> <ul><li><a href="/wiki/Duration_(music)" title="Duration (music)">music</a></li></ul></li> <li><a href="/wiki/Mental_chronometry" title="Mental chronometry">Mental chronometry</a></li> <li><a href="/wiki/Decimal_time" title="Decimal time">Decimal time</a></li> <li><a href="/wiki/Metric_time" title="Metric time">Metric time</a></li> <li><a href="/wiki/System_time" title="System time">System time</a></li> <li><a href="/wiki/Time_metrology" class="mw-redirect" title="Time metrology">Time metrology</a></li> <li><a href="/wiki/Time_value_of_money" title="Time value of money">Time value of money</a></li> <li><a href="/wiki/Timekeeper" title="Timekeeper">Timekeeper</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"></div><div role="navigation" class="navbox" aria-labelledby="Chronology" style="padding:3px"><table class="nowraplinks mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Chronology" title="Template:Chronology"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Chronology" title="Template talk:Chronology"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Chronology" title="Special:EditPage/Template:Chronology"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Chronology" style="font-size:114%;margin:0 4em"><a href="/wiki/Chronology" title="Chronology">Chronology</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%;line-height:1.2em;background:#cc9;">Key topics</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Archaeology" title="Archaeology">Archaeology</a></li> <li><a href="/wiki/Astronomy" title="Astronomy">Astronomy</a></li> <li><a href="/wiki/Geology" title="Geology">Geology</a></li> <li><a href="/wiki/History" title="History">History</a> <ul><li><a href="/wiki/Big_History" title="Big History">Big History</a></li></ul></li> <li><a href="/wiki/Paleontology" title="Paleontology">Paleontology</a></li> <li><a href="/wiki/Time" title="Time">Time</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;line-height:1.2em;background:#cc9;"><div class="hlist"><ul><li><a href="/wiki/Periodization" title="Periodization">Periods</a></li><li><a href="/wiki/Era" title="Era">Eras</a></li><li><a href="/wiki/Epoch_(reference_date)" class="mw-redirect" title="Epoch (reference date)">Epochs</a></li></ul></div></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;"><a href="/wiki/Calendar_era" title="Calendar era">Calendar eras</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Holocene_calendar" title="Holocene calendar">Human Era</a></li> <li><i><a href="/wiki/Ab_urbe_condita" title="Ab urbe condita">Ab urbe condita</a></i></li> <li><a href="/wiki/Anno_Domini" title="Anno Domini">Anno Domini</a>&#160;/&#32;<a href="/wiki/Common_Era" title="Common Era">Common Era</a></li> <li><a href="/wiki/Anno_Mundi" title="Anno Mundi">Anno Mundi</a></li> <li><a href="/wiki/Bosporan_era" title="Bosporan era">Bosporan era</a></li> <li><a href="/wiki/Bostran_era" title="Bostran era">Bostran era</a></li> <li><a href="/wiki/Byzantine_calendar" title="Byzantine calendar">Byzantine era</a></li> <li><a href="/wiki/Seleucid_era" title="Seleucid era">Seleucid era</a></li> <li><a href="/wiki/Era_of_Caesar_(Iberian_Peninsula)" class="mw-redirect" title="Era of Caesar (Iberian Peninsula)">Era of Caesar (Iberia)</a></li> <li><a href="/wiki/Before_present" class="mw-redirect" title="Before present">Before present</a></li> <li><a href="/wiki/Islamic_calendar" title="Islamic calendar">Hijri</a></li> <li><a href="/wiki/Egyptian_chronology" title="Egyptian chronology">Egyptian</a></li> <li><a href="/wiki/Sothic_cycle" title="Sothic cycle">Sothic cycle</a></li> <li><a href="/wiki/Hindu_units_of_time" title="Hindu units of time">Hindu units of time</a> (<a href="/wiki/Yuga" title="Yuga">Yuga</a>)</li> <li><a href="/wiki/Mesoamerican_calendars" title="Mesoamerican calendars">Mesoamerican</a> <ul><li><a href="/wiki/Mesoamerican_Long_Count_calendar" title="Mesoamerican Long Count calendar">Long Count</a></li> <li><a href="/wiki/Maya_calendar#Short_Count" title="Maya calendar">Short Count</a></li> <li><a href="/wiki/Tzolk%27in" class="mw-redirect" title="Tzolk&#39;in">Tzolk'in</a></li> <li><a href="/wiki/Haab%27" class="mw-redirect" title="Haab&#39;">Haab'</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;"><a href="/wiki/Regnal_year" title="Regnal year">Regnal year</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Anka_year" title="Anka year">Anka year</a></li> <li><a href="/wiki/Canon_of_Kings" title="Canon of Kings">Canon of Kings</a></li> <li><a href="/wiki/Regnal_years_of_English_and_British_monarchs" title="Regnal years of English and British monarchs">English and British regnal year</a></li> <li><a href="/wiki/Category:Regnal_lists" title="Category:Regnal lists">Lists of kings</a></li> <li><a href="/wiki/Limmu" title="Limmu">Limmu</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;"><a href="/wiki/Regnal_year" title="Regnal year">Era names</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chinese_era_name" title="Chinese era name">Chinese</a></li> <li><a href="/wiki/Japanese_era_name" title="Japanese era name">Japanese</a></li> <li><a href="/wiki/Korean_era_name" title="Korean era name">Korean</a></li> <li><a href="/wiki/Vietnamese_era_name" title="Vietnamese era name">Vietnamese</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;line-height:1.2em;background:#cc9;"><a class="mw-selflink selflink">Calendars</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;">Pre-Julian&#160;/&#32;Julian</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Roman_calendar" title="Roman calendar">Pre-Julian Roman</a></li> <li><a href="/wiki/Julian_calendar" title="Julian calendar">Original Julian</a></li> <li><a href="/wiki/Proleptic_Julian_calendar" title="Proleptic Julian calendar">Proleptic Julian</a></li> <li><a href="/wiki/Revised_Julian_calendar" title="Revised Julian calendar">Revised Julian</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;">Gregorian</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Gregorian_calendar" title="Gregorian calendar">Gregorian</a></li> <li><a href="/wiki/Proleptic_Gregorian_calendar" title="Proleptic Gregorian calendar">Proleptic Gregorian</a></li> <li><a href="/wiki/Old_Style_and_New_Style_dates" title="Old Style and New Style dates">Old Style and New Style dates</a></li> <li><a href="/wiki/Adoption_of_the_Gregorian_calendar" title="Adoption of the Gregorian calendar">Adoption of the Gregorian calendar</a></li> <li><a href="/wiki/Dual_dating" title="Dual dating">Dual dating</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;">Astronomical</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Lunisolar_calendar" title="Lunisolar calendar">Lunisolar</a> (<a href="/wiki/Hebrew_calendar" title="Hebrew calendar">Hebrew</a>, <a href="/wiki/Hindu_calendar" title="Hindu calendar">Hindu</a>)</li> <li><a href="/wiki/Solar_calendar" title="Solar calendar">Solar</a></li> <li><a href="/wiki/Lunar_calendar" title="Lunar calendar">Lunar</a> (<a href="/wiki/Islamic_calendar" title="Islamic calendar">Islamic</a>)</li> <li><a href="/wiki/Astronomical_year_numbering" title="Astronomical year numbering">Astronomical year numbering</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;">Others</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sexagenary_cycle" title="Sexagenary cycle">Chinese sexagenary cycle</a></li> <li><a href="/wiki/Geologic_Calendar" title="Geologic Calendar">Geologic Calendar</a></li> <li><a href="/wiki/Iranian_calendars" title="Iranian calendars">Iranian</a></li> <li><a href="/wiki/ISO_week_date" title="ISO week date">ISO week date</a></li> <li><a href="/wiki/Mesoamerican_calendars" title="Mesoamerican calendars">Mesoamerican</a> <ul><li><a href="/wiki/Maya_calendar" title="Maya calendar">Maya</a></li> <li><a href="/wiki/Aztec_calendar" title="Aztec calendar">Aztec</a></li></ul></li> <li><a href="/wiki/Winter_count" title="Winter count">Winter count</a></li> <li><a href="/wiki/New_Earth_Time" title="New Earth Time">New Earth Time</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;line-height:1.2em;background:#cc9;"><a href="/wiki/Astronomical_chronology" title="Astronomical chronology">Astronomic time</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0;background:#fff;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cosmic_Calendar" title="Cosmic Calendar">Cosmic Calendar</a></li> <li><a href="/wiki/Ephemeris" title="Ephemeris">Ephemeris</a></li> <li><a href="/wiki/Galactic_year" title="Galactic year">Galactic year</a></li> <li><a href="/wiki/Metonic_cycle" title="Metonic cycle">Metonic cycle</a></li> <li><a href="/wiki/Milankovitch_cycles" title="Milankovitch cycles">Milankovitch cycles</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;line-height:1.2em;background:#cc9;"><a href="/wiki/Geologic_time_scale" title="Geologic time scale">Geologic time</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;">Concepts</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Deep_time" title="Deep time">Deep time</a></li> <li><a href="/wiki/Geological_history_of_Earth" title="Geological history of Earth">Geological history of Earth</a></li> <li><a href="/wiki/Geologic_time_scale#Terminology" title="Geologic time scale">Geological time units</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;">Standards</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Global_Standard_Stratigraphic_Age" title="Global Standard Stratigraphic Age">Global Standard Stratigraphic Age (GSSA)</a></li> <li><a href="/wiki/Global_Boundary_Stratotype_Section_and_Point" title="Global Boundary Stratotype Section and Point">Global Boundary Stratotype Section and Point (GSSP)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;">Methods</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chronostratigraphy" title="Chronostratigraphy">Chronostratigraphy</a></li> <li><a href="/wiki/Geochronology" title="Geochronology">Geochronology</a></li> <li><a href="/wiki/Isotope_geochemistry" title="Isotope geochemistry">Isotope geochemistry</a></li> <li><a href="/wiki/Law_of_superposition" title="Law of superposition">Law of superposition</a></li> <li><a href="/wiki/Luminescence_dating" title="Luminescence dating">Luminescence dating</a></li> <li><a href="/wiki/Samarium%E2%80%93neodymium_dating" title="Samarium–neodymium dating">Samarium–neodymium dating</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;line-height:1.2em;background:#cc9;"><a href="/wiki/Chronological_dating" title="Chronological dating">Chronological<br />dating</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;"><a href="/wiki/Absolute_dating" title="Absolute dating">Absolute dating</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Amino_acid_dating" title="Amino acid dating">Amino acid racemisation</a></li> <li><a href="/wiki/Archaeomagnetic_dating" title="Archaeomagnetic dating">Archaeomagnetic dating</a></li> <li><a href="/wiki/Dendrochronology" title="Dendrochronology">Dendrochronology</a></li> <li><a href="/wiki/Ice_core" title="Ice core">Ice core</a></li> <li><a href="/wiki/Incremental_dating" title="Incremental dating">Incremental dating</a></li> <li><a href="/wiki/Lichenometry" title="Lichenometry">Lichenometry</a></li> <li><a href="/wiki/Paleomagnetism" title="Paleomagnetism">Paleomagnetism</a></li> <li><a href="/wiki/Radiometric_dating" title="Radiometric dating">Radiometric dating</a> <ul><li><a href="/wiki/Lead%E2%80%93lead_dating" title="Lead–lead dating">Lead–lead</a></li> <li><a href="/wiki/K%E2%80%93Ar_dating" title="K–Ar dating">Potassium–argon</a></li> <li><a href="/wiki/Radiocarbon_dating" title="Radiocarbon dating">Radiocarbon</a></li> <li><a href="/wiki/Uranium%E2%80%93lead_dating" title="Uranium–lead dating">Uranium–lead</a></li></ul></li> <li><a href="/wiki/Tephrochronology" title="Tephrochronology">Tephrochronology</a></li> <li><a href="/wiki/Luminescence_dating" title="Luminescence dating">Luminescence dating</a></li> <li><a href="/wiki/Thermoluminescence_dating" title="Thermoluminescence dating">Thermoluminescence dating</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8.0em;font-weight:normal;background:#cc9;"><a href="/wiki/Relative_dating" title="Relative dating">Relative dating</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Fluorine_absorption_dating" title="Fluorine absorption dating">Fluorine absorption</a></li> <li><a href="/wiki/Nitrogen_dating" title="Nitrogen dating">Nitrogen dating</a></li> <li><a href="/wiki/Obsidian_hydration_dating" title="Obsidian hydration dating">Obsidian hydration</a></li> <li><a href="/wiki/Seriation_(archaeology)" title="Seriation (archaeology)">Seriation</a></li> <li><a href="/wiki/Stratigraphy_(archaeology)" title="Stratigraphy (archaeology)">Stratigraphy</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;line-height:1.2em;background:#cc9;">Genetic methods</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Molecular_clock" title="Molecular clock">Molecular clock</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;line-height:1.2em;background:#cc9;">Linguistic methods</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Glottochronology" title="Glottochronology">Glottochronology</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;line-height:1.2em;background:#cc9;">Related topics</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chronicle" title="Chronicle">Chronicle</a></li> <li><a href="/wiki/New_Chronology_(Fomenko)" class="mw-redirect" title="New Chronology (Fomenko)">New Chronology</a></li> <li><a href="/wiki/Synchronoptic_view" title="Synchronoptic view">Synchronoptic view</a></li> <li><a href="/wiki/Timeline" title="Timeline">Timeline</a></li> <li><a href="/wiki/Year_zero" title="Year zero">Year zero</a></li> <li><a href="/wiki/Floruit" title="Floruit">Floruit</a></li> <li><a href="/wiki/Terminus_post_quem" title="Terminus post quem">Terminus post quem</a></li> <li><a href="/wiki/ASPRO_chronology" title="ASPRO chronology">ASPRO chronology</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"><style data-mw-deduplicate="TemplateStyles:r1038841319">.mw-parser-output .tooltip-dotted{border-bottom:1px dotted;cursor:help}</style></div><div role="navigation" class="navbox authority-control" aria-labelledby="Authority_control_databases_frameless&amp;#124;text-top&amp;#124;10px&amp;#124;alt=Edit_this_at_Wikidata&amp;#124;link=https&amp;#58;//www.wikidata.org/wiki/Q12132#identifiers&amp;#124;class=noprint&amp;#124;Edit_this_at_Wikidata" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Authority_control_databases_frameless&amp;#124;text-top&amp;#124;10px&amp;#124;alt=Edit_this_at_Wikidata&amp;#124;link=https&amp;#58;//www.wikidata.org/wiki/Q12132#identifiers&amp;#124;class=noprint&amp;#124;Edit_this_at_Wikidata" style="font-size:114%;margin:0 4em"><a href="/wiki/Help:Authority_control" title="Help:Authority control">Authority control databases</a> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q12132#identifiers" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, 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href="https://id.ndl.go.jp/auth/ndlna/00566872">Japan</a></span></li><li><span class="uid"><span class="rt-commentedText tooltip tooltip-dotted" title="kalendáře"><a rel="nofollow" class="external text" href="https://aleph.nkp.cz/F/?func=find-c&amp;local_base=aut&amp;ccl_term=ica=ph121395&amp;CON_LNG=ENG">Czech Republic</a></span></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://kopkatalogs.lv/F?func=direct&amp;local_base=lnc10&amp;doc_number=000065497&amp;P_CON_LNG=ENG">Latvia</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="http://olduli.nli.org.il/F/?func=find-b&amp;local_base=NLX10&amp;find_code=UID&amp;request=987007293784105171">Israel</a></span></li></ul></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" 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end\"] = 1,\n [\"Further\"] = 2,\n [\"Globalize\"] = 1,\n [\"Harvid\"] = 1,\n [\"Lang\"] = 5,\n [\"Main\"] = 5,\n [\"Redirect\"] = 1,\n [\"Reflist\"] = 1,\n [\"See also\"] = 1,\n [\"Sfn\"] = 7,\n [\"Short description\"] = 1,\n [\"Time measurement and standards\"] = 1,\n [\"Time topics\"] = 1,\n [\"Unreferenced section\"] = 1,\n [\"Use American English\"] = 1,\n [\"Use dmy dates\"] = 1,\n [\"Webarchive\"] = 1,\n [\"Wiktionary\"] = 1,\n}\narticle_whitelist = table#1 {\n}\n"},"cachereport":{"origin":"mw-web.codfw.main-5c59558b9d-lnpx4","timestamp":"20241130013541","ttl":2592000,"transientcontent":false}}});});</script> <script type="application/ld+json">{"@context":"https:\/\/schema.org","@type":"Article","name":"Calendar","url":"https:\/\/en.wikipedia.org\/wiki\/Calendar","sameAs":"http:\/\/www.wikidata.org\/entity\/Q12132","mainEntity":"http:\/\/www.wikidata.org\/entity\/Q12132","author":{"@type":"Organization","name":"Contributors to Wikimedia projects"},"publisher":{"@type":"Organization","name":"Wikimedia Foundation, Inc.","logo":{"@type":"ImageObject","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-hor-googpub.png"}},"datePublished":"2001-11-10T19:24:44Z","dateModified":"2024-11-19T06:29:02Z","image":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/e\/ed\/Kalender_Indonesia.jpg","headline":"system of organizing days for social, religious, commercial, or administrative purposes"}</script> </body> </html>

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