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dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Set of characters used to express date and time</div> <p> In communications messages, a <b>date-time group</b> (<b>DTG</b>) is a set of characters, usually in a prescribed format, used to express the year, the month, the day of the month, the hour of the day, the minute of the hour, and the <a href="/wiki/Time_zone" title="Time zone">time zone</a>, if different from <a href="/wiki/Coordinated_Universal_Time" title="Coordinated Universal Time">Coordinated Universal Time</a> (UTC).<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (July 2013)">citation needed</span></a></i>]</sup> The order in which these elements are presented may vary. The DTG is usually placed in the <a href="/wiki/Header_(computing)" title="Header (computing)">header</a> of the message. One example is "14:13 Nov 22, 2024 (UTC)"; while another example is "14:13 22 Nov 2024". </p><p>The DTG may indicate either the <a href="/wiki/Calendar_date" title="Calendar date">date</a> and time a message was dispatched by a transmitting station or the date and time it was handed into a <a href="/wiki/Transmission_(telecommunications)" class="mw-redirect" title="Transmission (telecommunications)">transmission</a> <a href="/wiki/Facility_(telecommunications)" class="mw-redirect" title="Facility (telecommunications)">facility</a> by a <a href="/wiki/User_(telecommunications)" title="User (telecommunications)">user</a> or originator for dispatch. </p><p>The DTG may be used as a message <a href="/wiki/Identifier" title="Identifier">identifier</a> if it is unique for each message. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Military_Date_Time_Group">Military Date Time Group</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Date-time_group&action=edit&section=1" title="Edit section: Military Date Time Group"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></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">See also: <a href="/wiki/List_of_military_time_zones" class="mw-redirect" title="List of military time zones">List of military time zones</a></div> <p>A form of DTG is used in the <a href="/wiki/US_Military" class="mw-redirect" title="US Military">US Military</a>'s <a href="/wiki/Defense_Message_System" title="Defense Message System">message traffic</a> (a form of <a href="/wiki/Automated_Message_Handling_System" title="Automated Message Handling System">Automated Message Handling System</a>). In US military messages and communications (e.g., on maps showing troop movements) the format is <i>DD HHMM (SS)</i> Z<i> MON YY</i>. Although occasionally seen with spaces, it can also be written as a single string of characters. Three different formats can be found: </p> <ul><li><style data-mw-deduplicate="TemplateStyles:r886049734">.mw-parser-output .monospaced{font-family:monospace,monospace}</style><span class="monospaced"><b>DDHHMMSSZmmmYY</b></span> - Full time (used for software timestamps)</li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced"><b>DDHHMMZmmmYY</b></span> - shortened time (used e.g. for timestamps manually written)</li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced"><b>DDHHMMZ</b></span> - short time (e.g. used for planning)</li></ul> <p><br /> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced"><b>Z</b></span> references the military identifier of time zone: </p> <ul><li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-12: Y (e.g., Baker Island)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-11: X (American Samoa, Niue)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-10: W (Honolulu, HI)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-9: V (Juneau, AK)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-8: U (<a href="/wiki/Pacific_Standard_Time" class="mw-redirect" title="Pacific Standard Time">PST</a>, Los Angeles, CA)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-7: T (<a href="/wiki/Mountain_Standard_Time" class="mw-redirect" title="Mountain Standard Time">MST</a>, Denver, CO)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-6: S (<a href="/wiki/Central_Standard_Time" class="mw-redirect" title="Central Standard Time">CST</a>, Dallas, TX)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-5: R (<a href="/wiki/Eastern_Standard_Time_(North_America)" class="mw-redirect" title="Eastern Standard Time (North America)">EST</a>, New York, NY)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-4: Q (Halifax, Nova Scotia)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-3: P (Buenos Aires, Argentina; Rio de Janeiro, Brazil)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-2: O (South Georgia and the South Sandwich Islands)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>-1: N (Azores)</li> <li><b><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+-0: Z (<a href="/wiki/Zulu_time" class="mw-redirect" title="Zulu time">Zulu time</a>)</b></li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+1: A (France)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+2: B (Athens, Greece)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+3: C (Arab Standard Time, Iraq, Bahrain, Kuwait, Saudi Arabia, Yemen, Qatar, as well as Moscow in Russia)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+4: D (Oman, the UAE)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+5: E (Pakistan, western Kazakhstan, Tajikistan, Uzbekistan, and Turkmenistan)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+6: F (eastern Kazakhstan, Bangladesh)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+7: G (Thailand)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+8: H (Beijing, China, Singapore)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+9: I (Tokyo, Japan)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+10: K (Brisbane, Australia)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+11: L (Sydney, Australia)</li> <li><a href="/wiki/UTC" class="mw-redirect" title="UTC">UTC</a>+12: M (Wellington, New Zealand)</li></ul> <div class="mw-heading mw-heading3"><h3 id="Examples">Examples</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Date-time_group&action=edit&section=2" title="Edit section: Examples"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Example 1: <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced"><b>051100Z</b></span> represents the 5th day of the current month 11:00 (UTC). </p><p>Example 2: <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced"><b>091630Tjul11</b></span> represents 9 July 2011 4:30 pm (MST). </p><p>Example 3: <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced"><b><style data-mw-deduplicate="TemplateStyles:r920968872">.mw-parser-output span.allcaps{text-transform:uppercase}</style><span class="allcaps">22141312ZNov24</span></b></span> represents the current time of refresh: (Nov) 22 14:13:12, Nov 2024 (UTC). </p> <div class="mw-heading mw-heading2"><h2 id="Sources">Sources</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Date-time_group&action=edit&section=3" title="Edit section: Sources"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://gwg.nga.mil/ntb/baseline/docs/2500a/2500a.pdf">MIL-STD-2500A</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170321080040/http://www.gwg.nga.mil/ntb/baseline/docs/2500a/2500a.pdf">Archived</a> 21 March 2017 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> 12 October 1994</li></ul> <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=Date-time_group&action=edit&section=4" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Calendar_date" title="Calendar date">Calendar date</a></li> <li><a href="/wiki/ISO_8601" title="ISO 8601">ISO 8601</a></li></ul> <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=Date-time_group&action=edit&section=5" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>TM 20-205, the Dictionary of United States Army Terms (1944)</li> <li>ACP 121(I) p 3–7</li></ul> <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 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data-mw-deduplicate="TemplateStyles:r1041539562">.mw-parser-output .citation{word-wrap:break-word}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}</style><span class="citation 1037C"><span class="noviewer" typeof="mw:File"><span><img alt="Public Domain" src="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/12px-PD-icon.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/18px-PD-icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/24px-PD-icon.svg.png 2x" data-file-width="196" data-file-height="196" /></span></span> This article incorporates <a href="/wiki/Copyright_status_of_works_by_the_federal_government_of_the_United_States" title="Copyright status of works by the federal government of the United States">public domain material</a> from <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output 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(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20220122224547/http://www.its.bldrdoc.gov/fs-1037/dir-010/_1465.htm">"date-time group (DTG)"</a>. <i><a href="/wiki/Federal_Standard_1037C" title="Federal Standard 1037C">Federal Standard 1037C</a></i>. <a href="/wiki/General_Services_Administration" title="General Services Administration">General Services Administration</a>. 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