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class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Digital clock</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 23 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-23" 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">23 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B3%D8%A7%D8%B9%D8%A9_%D8%B1%D9%82%D9%85%D9%8A%D8%A9" title="ساعة رقمية – Arabic" lang="ar" hreflang="ar" data-title="ساعة رقمية" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Rellotge_digital" title="Rellotge digital – Catalan" lang="ca" hreflang="ca" data-title="Rellotge digital" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Digitalur" title="Digitalur – Danish" lang="da" hreflang="da" data-title="Digitalur" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Digitaluhr" title="Digitaluhr – German" lang="de" hreflang="de" data-title="Digitaluhr" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Reloj_digital" title="Reloj digital – Spanish" lang="es" hreflang="es" data-title="Reloj digital" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Erloju_digital" title="Erloju digital – Basque" lang="eu" hreflang="eu" data-title="Erloju digital" 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/%D8%B3%D8%A7%D8%B9%D8%AA_%D8%AF%DB%8C%D8%AC%DB%8C%D8%AA%D8%A7%D9%84%DB%8C" title="ساعت دیجیتالی – Persian" lang="fa" hreflang="fa" data-title="ساعت دیجیتالی" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%94%94%EC%A7%80%ED%84%B8_%EC%8B%9C%EA%B3%84" title="디지털 시계 – Korean" lang="ko" hreflang="ko" data-title="디지털 시계" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Jam_digital" title="Jam digital – Indonesian" lang="id" hreflang="id" data-title="Jam digital" 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-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Orologio_digitale" title="Orologio digitale – Italian" lang="it" hreflang="it" data-title="Orologio digitale" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%AD%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BD%D0%B4%D1%8B_%D1%81%D0%B0%D2%93%D0%B0%D1%82" title="Электронды сағат – Kazakh" lang="kk" hreflang="kk" data-title="Электронды сағат" data-language-autonym="Қазақша" data-language-local-name="Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ml badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://ml.wikipedia.org/wiki/%E0%B4%A1%E0%B4%BF%E0%B4%9C%E0%B4%BF%E0%B4%B1%E0%B5%8D%E0%B4%B1%E0%B5%BD_%E0%B4%95%E0%B5%8D%E0%B4%B2%E0%B5%8B%E0%B4%95%E0%B5%8D%E0%B4%95%E0%B5%8D" title="ഡിജിറ്റൽ ക്ലോക്ക് – Malayalam" lang="ml" hreflang="ml" data-title="ഡിജിറ്റൽ ക്ലോക്ക്" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%87%E3%82%B8%E3%82%BF%E3%83%AB%E6%99%82%E8%A8%88" title="デジタル時計 – Japanese" lang="ja" hreflang="ja" data-title="デジタル時計" 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-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Zegar_cyfrowy" title="Zegar cyfrowy – Polish" lang="pl" hreflang="pl" data-title="Zegar cyfrowy" 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/Rel%C3%B3gio_digital" title="Relógio digital – Portuguese" lang="pt" hreflang="pt" data-title="Relógio digital" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%AD%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BD%D0%BD%D1%8B%D0%B5_%D1%87%D0%B0%D1%81%D1%8B" title="Электронные часы – Russian" lang="ru" hreflang="ru" data-title="Электронные часы" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Sahati_dixhital" title="Sahati dixhital – Albanian" lang="sq" hreflang="sq" data-title="Sahati dixhital" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Digitaalikello" title="Digitaalikello – Finnish" lang="fi" hreflang="fi" data-title="Digitaalikello" 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/Digitalur" title="Digitalur – Swedish" lang="sv" hreflang="sv" data-title="Digitalur" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%B1%D9%82%D9%85%DB%8C_%DA%AF%DA%BE%D9%86%D9%B9%D8%A7" title="رقمی گھنٹا – Urdu" lang="ur" hreflang="ur" data-title="رقمی گھنٹا" data-language-autonym="اردو" data-language-local-name="Urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/%C4%90%E1%BB%93ng_h%E1%BB%93_k%E1%BB%B9_thu%E1%BA%ADt_s%E1%BB%91" title="Đồng hồ kỹ thuật số – Vietnamese" lang="vi" hreflang="vi" data-title="Đồng hồ kỹ thuật số" 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dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Type of clock that displays the time with numbers</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 appliance. For timing reference for digital audio, see <a href="/wiki/Word_clock" title="Word clock">Word clock</a>.</div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Digital-clock-alarm.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Digital-clock-alarm.jpg/220px-Digital-clock-alarm.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Digital-clock-alarm.jpg/330px-Digital-clock-alarm.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Digital-clock-alarm.jpg/440px-Digital-clock-alarm.jpg 2x" data-file-width="2500" data-file-height="1870" /></a><figcaption>Basic digital alarm clock without a radio. The mark in the top-left of the display indicates that the time is 4:00pm (16:00), not 4:00am.</figcaption></figure> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Sony_Digimatic_8FC-59W_radio_alarm_clock_20060526.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Sony_Digimatic_8FC-59W_radio_alarm_clock_20060526.png/220px-Sony_Digimatic_8FC-59W_radio_alarm_clock_20060526.png" decoding="async" width="220" height="103" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Sony_Digimatic_8FC-59W_radio_alarm_clock_20060526.png/330px-Sony_Digimatic_8FC-59W_radio_alarm_clock_20060526.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Sony_Digimatic_8FC-59W_radio_alarm_clock_20060526.png/440px-Sony_Digimatic_8FC-59W_radio_alarm_clock_20060526.png 2x" data-file-width="640" data-file-height="300" /></a><figcaption>A 1969 radio alarm clock (Sony Digimatic 8FC-59W) with an early mechanical-digital display</figcaption></figure> <p>A <b>digital clock</b> displays the time <a href="/wiki/Digital_data" title="Digital data">digitally</a> (i.e. in numerals or other symbols), as opposed to an <a href="/wiki/Clock#Analog" title="Clock">analogue clock</a>. </p><p>Digital clocks are often associated with electronic drives, but the "digital" description refers only to the display, not to the drive mechanism. (Both analogue and digital clocks can be driven either mechanically or electronically, but "clockwork" mechanisms with digital displays are rare.) </p> <meta property="mw:PageProp/toc" /> <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=Digital_clock&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The first digital pocket watch was the invention of <a href="/wiki/Austria" title="Austria">Austrian</a> engineer Josef Pallweber<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> who created his "jump-hour" mechanism in 1883. Instead of a conventional dial, the jump-hour featured two windows in an enamel dial, through which the hours and minutes are visible on rotating discs. The second hand remained conventional. By 1885, Pallweber mechanism was already on the market in pocket watches by <a href="/wiki/Cort%C3%A9bert_(watch_manufacturer)" title="Cortébert (watch manufacturer)">Cortébert</a> and <a href="/wiki/International_Watch_Company" class="mw-redirect" title="International Watch Company">IWC</a>; arguably contributing to the subsequent rise and commercial success of IWC. The principles of Pallweber jump-hour movement had appeared in wristwatches by the 1920s (Cortébert) and are still used today (<a href="/wiki/Chronoswiss" title="Chronoswiss">Chronoswiss</a> Digiteur). While the original inventor did not have a watch brand at the time, his name has since been resurrected by a newly established watch manufacturer.<sup id="cite_ref-JosefPallweber_2-0" class="reference"><a href="#cite_note-JosefPallweber-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p><b><a href="/wiki/Flip_clock" title="Flip clock">Plato clocks</a></b> used a similar idea but a different layout. These spring-wound pieces consisted of a glass cylinder with a column inside, affixed to which were small digital cards with numbers printed on them, which flipped as time passed. The Plato clocks were introduced at the St. Louis World Fair in 1904, produced by Ansonia Clock Company. Eugene Fitch of New York patented the clock design in 1903.<sup id="cite_ref-Churm_3-0" class="reference"><a href="#cite_note-Churm-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Thirteen years earlier, Josef Pallweber had patented the same invention using digital cards (different from his 1885 patent using moving disks) in Germany (DRP No. 54093).<sup id="cite_ref-patent_4-0" class="reference"><a href="#cite_note-patent-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> The German factory <a href="/wiki/Aktiengesellschaft_f%C3%BCr_Uhrenfabrikation_Lenzkirch" title="Aktiengesellschaft für Uhrenfabrikation Lenzkirch">Aktiengesellschaft für Uhrenfabrikation Lenzkirch</a> made such digital clocks in 1893 and 1894.<sup id="cite_ref-digital-precise_5-0" class="reference"><a href="#cite_note-digital-precise-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>The earliest patent for a digital alarm clock was registered by D. E. Protzmann and others on October 23, 1956, in the United States.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Protzmann and his associates also patented another digital clock in 1970, which was said to use a minimal amount of moving parts. Two side-plates held digital numerals between them, while an electric motor and cam gear outside controlled movement.<sup id="cite_ref-Churm_3-1" class="reference"><a href="#cite_note-Churm-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>In 1970, the first digital wristwatch with an LED display was unveiled on <a href="/wiki/The_Tonight_Show_Starring_Johnny_Carson" title="The Tonight Show Starring Johnny Carson">The Tonight Show Starring Johnny Carson</a>, although it was not released until 1972.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> Called the Pulsar, and produced by the <a href="/wiki/Hamilton_Watch_Company" title="Hamilton Watch Company">Hamilton Watch Company</a>, this watch was hinted at two years prior when the same company created a non-function digital watch prop (with a main analogue face but a secondary digital display) for Kubrick's <i><a href="/wiki/2001:_A_Space_Odyssey_(film)" class="mw-redirect" title="2001: A Space Odyssey (film)">2001: A Space Odyssey</a></i>.<sup id="cite_ref-h2g2_8-0" class="reference"><a href="#cite_note-h2g2-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Construction">Construction</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Digital_clock&action=edit&section=2" title="Edit section: Construction"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Digital clocks typically use the 50 or 60 <a href="/wiki/Hertz" title="Hertz">hertz</a> oscillation of <a href="/wiki/AC_power" title="AC power">AC power</a> or a 32,768 hertz <a href="/wiki/Crystal_oscillator" title="Crystal oscillator">crystal oscillator</a> as in a <a href="/wiki/Quartz_clock" title="Quartz clock">quartz clock</a> to keep time. Most digital clocks display the hour of the day in <a href="/wiki/24-hour_clock" title="24-hour clock">24-hour format</a>; in the United States and a few other countries, a commonly used hour sequence option is <a href="/wiki/12-hour_clock" title="12-hour clock">12-hour format</a> (with some indication of AM or PM). Some timepieces, such as many <a href="/wiki/Digital_watch" class="mw-redirect" title="Digital watch">digital watches</a>, can be switched between 12-hour and 24-hour modes. Emulations of analog-style faces often use an <a href="/wiki/LCD" class="mw-redirect" title="LCD">LCD</a> screen, and these are also sometimes described as "digital". </p> <div class="mw-heading mw-heading2"><h2 id="Displays">Displays</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Digital_clock&action=edit&section=3" title="Edit section: Displays"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Digital_clock_changing_numbers.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Digital_clock_changing_numbers.jpg/220px-Digital_clock_changing_numbers.jpg" decoding="async" width="220" height="77" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Digital_clock_changing_numbers.jpg/330px-Digital_clock_changing_numbers.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Digital_clock_changing_numbers.jpg/440px-Digital_clock_changing_numbers.jpg 2x" data-file-width="2560" data-file-height="900" /></a><figcaption>A digital clock's display changing numbers</figcaption></figure> <p>To represent time, most digital clocks use a <a href="/wiki/Seven-segment_display" title="Seven-segment display">seven-segment</a> <a href="/wiki/LED" class="mw-redirect" title="LED">LED</a>, <a href="/wiki/Vacuum_fluorescent_display" title="Vacuum fluorescent display">VFD</a>, or LCD for each of the four <a href="/wiki/Numerical_digit" title="Numerical digit">digits</a>. They generally also include other elements to indicate whether the time is AM or PM, whether or not an alarm is set, and so on. Older digital clocks used numbers painted on wheels, or <a href="/wiki/Split-flap_display" title="Split-flap display">a split-flap display</a>. High-end digital clocks use <a href="/wiki/Dot-matrix_display" title="Dot-matrix display">dot matrix displays</a> and use animations for digit changes. </p> <div class="mw-heading mw-heading3"><h3 id="Setting">Setting</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Digital_clock&action=edit&section=4" title="Edit section: Setting"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>If people find difficulty in setting the time in some designs of digital clocks in electronic devices where the clock is not a critical function, they may not be set at all, displaying the default after powered on, 00:00 or 12:00.<sup id="cite_ref-Zeon_Ltd_9-0" class="reference"><a href="#cite_note-Zeon_Ltd-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p><p>Because they run on electricity, digital clocks often need to be reset whenever the power is cut off, even for a very brief period of time. This is a particular problem with <a href="/wiki/Alarm_clock" title="Alarm clock">alarm clocks</a> that have no "battery" backup, because a <a href="/wiki/Power_outage" title="Power outage">power outage</a> during the night usually prevents the clock from triggering the alarm in the morning. </p><p>To reduce the problem, many devices designed to operate on household electricity incorporate a <a href="/wiki/Battery_(electricity)" class="mw-redirect" title="Battery (electricity)">battery</a> backup to maintain the time during power outages and during times of disconnection from the power supply. More recently, some devices incorporate a method for automatically setting the time, such as using a broadcast <a href="/wiki/Radio" title="Radio">radio</a> <a href="/wiki/Time_signal" title="Time signal">time signal</a> from an <a href="/wiki/Atomic_clock" title="Atomic clock">atomic clock</a>, getting the time from an existing <a href="/wiki/Satellite_television" title="Satellite television">satellite television</a> or <a href="/wiki/Computer" title="Computer">computer</a> connection, or by being set at the factory and then maintaining the time from then on with a quartz movement powered by an internal rechargeable battery. Commercial digital clocks are typically more reliable than consumer clocks. Multi-decade backup batteries can be used to maintain time during power loss. </p> <ul class="gallery mw-gallery-traditional"> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 230px;"><span typeof="mw:File"><a href="/wiki/File:LCD_Clock_Grey.jpg" class="mw-file-description" title="An LCD battery-operated clock without alarm"><img alt="An LCD battery-operated clock without alarm" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/LCD_Clock_Grey.jpg/200px-LCD_Clock_Grey.jpg" decoding="async" width="200" height="105" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/LCD_Clock_Grey.jpg/300px-LCD_Clock_Grey.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a9/LCD_Clock_Grey.jpg/400px-LCD_Clock_Grey.jpg 2x" data-file-width="2084" data-file-height="1094" /></a></span></div> <div class="gallerytext">An LCD battery-operated clock without alarm</div> </li> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 230px;"><span typeof="mw:File"><a href="/wiki/File:Digital-clock-radio-premium.jpg" class="mw-file-description" title="A premium digital clock radio with digital tuning"><img alt="A premium digital clock radio with digital tuning" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Digital-clock-radio-premium.jpg/186px-Digital-clock-radio-premium.jpg" decoding="async" width="186" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Digital-clock-radio-premium.jpg/280px-Digital-clock-radio-premium.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/65/Digital-clock-radio-premium.jpg/373px-Digital-clock-radio-premium.jpg 2x" data-file-width="2500" data-file-height="2683" /></a></span></div> <div class="gallerytext">A premium digital clock radio with digital tuning</div> </li> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 230px;"><span typeof="mw:File"><a href="/wiki/File:Digital-clock-radio-basic_hf.jpg" class="mw-file-description" title="A basic digital clock radio with analog tuning"><img alt="A basic digital clock radio with analog tuning" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/43/Digital-clock-radio-basic_hf.jpg/200px-Digital-clock-radio-basic_hf.jpg" decoding="async" width="200" height="134" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/43/Digital-clock-radio-basic_hf.jpg/300px-Digital-clock-radio-basic_hf.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/43/Digital-clock-radio-basic_hf.jpg/400px-Digital-clock-radio-basic_hf.jpg 2x" data-file-width="2002" data-file-height="1340" /></a></span></div> <div class="gallerytext">A basic digital clock radio with analog tuning</div> </li> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 230px;"><span typeof="mw:File"><a href="/wiki/File:LCD_Clock.jpg" class="mw-file-description" title="Transflective LCD battery-operated clock with radio time setting"><img alt="Transflective LCD battery-operated clock with radio time setting" src="//upload.wikimedia.org/wikipedia/commons/thumb/1/13/LCD_Clock.jpg/176px-LCD_Clock.jpg" decoding="async" width="176" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/13/LCD_Clock.jpg/264px-LCD_Clock.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/13/LCD_Clock.jpg/352px-LCD_Clock.jpg 2x" data-file-width="1000" data-file-height="1137" /></a></span></div> <div class="gallerytext">Transflective LCD battery-operated clock with radio time setting </div> </li> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 230px;"><span typeof="mw:File"><a href="/wiki/File:Nixie_clock.jpg" class="mw-file-description" title="Telefunken nixie tube clock"><img alt="Telefunken nixie tube clock" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/ca/Nixie_clock.jpg/200px-Nixie_clock.jpg" decoding="async" width="200" height="116" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/ca/Nixie_clock.jpg/300px-Nixie_clock.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/ca/Nixie_clock.jpg/400px-Nixie_clock.jpg 2x" data-file-width="1177" data-file-height="684" /></a></span></div> <div class="gallerytext"><a href="/wiki/Telefunken" title="Telefunken">Telefunken</a> <a href="/wiki/Nixie_tube" title="Nixie tube">nixie tube</a> clock</div> </li> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 230px;"><span typeof="mw:File"><a href="/wiki/File:Orologio_Solari_Cifra_3.jpg" class="mw-file-description" title="Solari Cifra 3 designed by Gino Valle [it] (1965)"><img alt="Solari Cifra 3 designed by Gino Valle [it] (1965)" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Orologio_Solari_Cifra_3.jpg/200px-Orologio_Solari_Cifra_3.jpg" decoding="async" width="200" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Orologio_Solari_Cifra_3.jpg/300px-Orologio_Solari_Cifra_3.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Orologio_Solari_Cifra_3.jpg/400px-Orologio_Solari_Cifra_3.jpg 2x" data-file-width="4608" data-file-height="3456" /></a></span></div> <div class="gallerytext"><a href="/wiki/Solari_di_Udine" title="Solari di Udine">Solari</a> <i><a href="/wiki/Cifra_3" title="Cifra 3">Cifra 3</a></i> designed by <a href="/w/index.php?title=Gino_Valle&action=edit&redlink=1" class="new" title="Gino Valle (page does not exist)">Gino Valle</a><span class="noprint" style="font-size:85%; font-style: normal;"> [<a href="https://it.wikipedia.org/wiki/Gino_Valle" class="extiw" title="it:Gino Valle">it</a>]</span> (1965)</div> </li> </ul> <div class="mw-heading mw-heading2"><h2 id="Uses">Uses</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Digital_clock&action=edit&section=5" title="Edit section: Uses"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Digital-clock-oven.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/ad/Digital-clock-oven.jpg/220px-Digital-clock-oven.jpg" decoding="async" width="220" height="109" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/ad/Digital-clock-oven.jpg/330px-Digital-clock-oven.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/ad/Digital-clock-oven.jpg/440px-Digital-clock-oven.jpg 2x" data-file-width="2500" data-file-height="1239" /></a><figcaption>This digital clock has been attached to an oven.</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Digital_cube_light_clock.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Digital_cube_light_clock.JPG/220px-Digital_cube_light_clock.JPG" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Digital_cube_light_clock.JPG/330px-Digital_cube_light_clock.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Digital_cube_light_clock.JPG/440px-Digital_cube_light_clock.JPG 2x" data-file-width="3762" data-file-height="2822" /></a><figcaption>This digital clock reacts to temperature.</figcaption></figure> <p>Because digital clocks can be very small and inexpensive devices that enhance the popularity of product designs, they are often incorporated into all kinds of devices such as cars, radios, <a href="/wiki/Television" title="Television">televisions</a>, <a href="/wiki/Microwave_oven" title="Microwave oven">microwave ovens</a>, standard <a href="/wiki/Oven" title="Oven">ovens</a>, computers and cell phones. Sometimes their usefulness is disputed: a common complaint is that when time has to be set to Daylight Saving Time, many household clocks have to be readjusted. The incorporation of automatic synchronization by a radio time signal is reducing this problem (see <a href="/wiki/Radio_clock" title="Radio clock">Radio clock</a>). Smart digital clocks, in addition to displaying time, scroll additional information such as weather and notifications. </p> <div style="clear:both;" class=""></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=Digital_clock&action=edit&section=6" title="Edit section: References"><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 .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .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://depatisnet.dpma.de/DepatisNet/depatisnet?window=1&space=menu&content=index&action=index">"DEPATISnet | DEPATISnet-Startseite"</a>. <i>depatisnet.dpma.de</i><span class="reference-accessdate">. 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The German Clock Museum. April 2015. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20150923213945/http://www.deutsches-uhrenmuseum.de/en/museum/items-of-the-month/item-of-the-month-april-2015.html">Archived</a> from the original on 2015-09-23<span class="reference-accessdate">. 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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:Digital_clocks" class="extiw" title="commons:Category:Digital clocks">Digital clocks</a></span>.</div></div> </div> <ul><li><a rel="nofollow" class="external text" href="https://www.bbc.co.uk/dna/h2g2/A1006534">History of the Digital Watch</a></li> <li><a rel="nofollow" class="external text" href="http://raredigitalwatches.com/">Museum of Vintage Rare Digital LCD Wrist Watches</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 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href="/wiki/Telechron#Henry_Warren:_the_Synchronous_Motor_and_the_Master_Clock" title="Telechron">Synchronous Motor and the Master Clock</a></li> <li><a href="/wiki/Utility_frequency" title="Utility frequency">Utility frequency</a></li> <li><a href="/wiki/Synchronous_motor" title="Synchronous motor">Synchronous motor</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Electronic</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/Quartz_clock" title="Quartz clock">Quartz clock</a></li> <li><a href="/wiki/Atomic_clock" title="Atomic clock">Atomic clock</a></li> <li><a href="/wiki/Radio_clock" title="Radio clock">Radio clock</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 href="/wiki/Calendar" title="Calendar">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 href="/wiki/Calendar#Systems" title="Calendar">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 class="mw-selflink selflink">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> 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