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<title>UTC offset</title>

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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">UTC offset</span></span>

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<p>The <b>UTC offset</b> is the difference in hours and minutes between <a href="Coordinated_Universal_Time" title="Coordinated Universal Time">Coordinated Universal Time</a> (UTC) and the <a href="Standard_time" title="Standard time">standard time</a> at a particular place.<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> This difference is expressed with respect to UTC and is generally shown in the format <span class="nowrap">±[hh]:[mm]</span>, <span class="nowrap">±[hh][mm]</span>, or <span class="nowrap">±[hh]</span>. So if the time being described is two hours ahead of UTC (such as in <a href="Kigali" title="Kigali">Kigali</a>, <a href="Rwanda" title="Rwanda">Rwanda</a> [approximately 30° E]), the UTC offset would be "+02:00", "+0200", or simply "+02".

</p><p>By convention, every inhabited place in the world has a UTC offset that is a multiple of 15 minutes but the majority of offsets are stated in whole hours. There are many cases where the national <a href="Standard_time" title="Standard time">standard time</a> uses a UTC offset that is not defined solely by longitude.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="Time_zones_and_time_offsets">Time zones and time offsets</h2></div>

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</style><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="Time_zone" title="Time zone">Time zone</a></div>

<p>A <i><a href="Time_zone" title="Time zone">time zone</a></i> is a geographical <a href="Region" title="Region">region</a> in which residents observe the same <a href="Standard_time" title="Standard time">standard time</a>. Although nominally a new time zone is established every 15 degrees east or west of the <a href="Prime_meridian" title="Prime meridian">prime meridian</a> (meaning a one-hour change in the time), in practice local geographical or political considerations may vary its application. The most extreme example of this is <a href="Time_in_China" title="Time in China">time in China</a>, which applies a single standard time offset of <a href="UTC%2B08%3A00" title="UTC+08:00">UTC+08:00</a> (eight hours ahead of <a href="Coordinated_Universal_Time" title="Coordinated Universal Time">Coordinated Universal Time</a>), even though China spans five geographical <a href="Time_zones" class="mw-redirect" title="Time zones">time zones</a>.

</p><p>The UTC offset (or <b>time offset</b>) is an amount of time added to <a href="Coordinated_Universal_Time" title="Coordinated Universal Time">Coordinated Universal Time</a> (UTC) time to specify the time at a given location.

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<div class="mw-heading mw-heading3"><h3 id="Daylight_saving_time">Daylight saving time</h3></div>

<div role="note" class="hatnote navigation-not-searchable">Main articles: <a href="Daylight_saving_time" title="Daylight saving time">Daylight saving time</a>, <a href="Standard_time" title="Standard time">Standard time</a>, and <a href="Civil_time" title="Civil time">Civil time</a></div>

<p>Several regions of the world use <a href="Daylight_saving_time" title="Daylight saving time">daylight saving time</a> (DST) and the UTC offset during this season is typically obtained by adding one hour to local standard time. <a href="Central_European_Time" title="Central European Time">Central European Time</a> <a href="UTC%2B01%3A00" title="UTC+01:00">UTC+01:00</a> is replaced by <a href="Central_European_Summer_Time" title="Central European Summer Time">Central European Summer Time</a> <a href="UTC%2B02%3A00" title="UTC+02:00">UTC+02:00</a>, and Pacific Standard Time <a href="UTC%E2%88%9208%3A00" title="UTC−08:00">UTC−08:00</a> is replaced by Pacific Daylight Time <a href="UTC%E2%88%9207%3A00" title="UTC−07:00">UTC−07:00</a>.

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<div class="mw-heading mw-heading2"><h2 id="Illustrative_examples">Illustrative examples</h2></div>

<div role="note" class="hatnote navigation-not-searchable">Main article: <a href="List_of_UTC_offsets" title="List of UTC offsets">List of UTC offsets</a></div>

<div role="note" class="hatnote navigation-not-searchable">This set of cities has been chosen to illustrate the difference between local time and UTC, because they are as close as practicable to 0°, 45°, 90°, 135° and 180° and because they are sufficiently near the <a href="Equator" title="Equator">equator</a> so as not to use DST.</div>

<caption>Examples of the difference between local standard time and UTC

</caption>

<th>Location</th>

<th>Longitude</th>

<th>UTC offset</th>

<th>When UTC time is 12:00,<br>local time is:</th>

<th>When local time is 12:00,<br>UTC time is:

</th></tr>

<tr>

<td><a href="Accra" title="Accra">Accra</a>, <a href="Ghana" title="Ghana">Ghana</a></td>

<td>12:00

</td></tr>

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<td><a href="Mogadishu" title="Mogadishu">Mogadishu</a>, <a href="Somalia" title="Somalia">Somalia</a></td>

<td>09:00

</td></tr>

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<td><a href="Dhaka" title="Dhaka">Dhaka</a>, <a href="Bangladesh" title="Bangladesh">Bangladesh</a></td>

<td>06:00

</td></tr>

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<td><a href="Koror_(city)" title="Koror (city)">Koror</a>, <a href="Palau" title="Palau">Palau</a></td>

<td>03:00

</td></tr>

<tr>

<td>00:00

</td></tr>

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<td><a href="Honolulu" title="Honolulu">Honolulu</a>, United States</td>

<td>22:00

</td></tr>

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<td><a href="Guatemala_City" title="Guatemala City">Guatemala City</a>, <a href="Guatemala" title="Guatemala">Guatemala</a></td>

<td>18:00

</td></tr>

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<td><a href="Bras%C3%ADlia" title="Brasília">Brasília</a>, <a href="Brazil" title="Brazil">Brazil</a></td>

<td>15:00

</td></tr></tbody></table>

<ul><li><a href="ISO_8601" title="ISO 8601">ISO 8601</a> – international standard for representing dates and times.</li></ul>

<div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2></div>

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<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text">For example, <a href="Iceland" title="Iceland">Iceland</a> (capital Reykjavík, 22° W): the "UTC offset defined solely by its longitude" is UTC−02:00, but the national standard time uses an offset (+00:00) that differs from it.</span>

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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite id="CITEREFKornberg" class="citation web cs1">Kornberg, Sara. <a rel="nofollow" class="external text" href="https://www.timeanddate.com/time/utc-offsets.html">"Understanding UTC Offsets"</a>. <i>Time and Date</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2024-12-10</span></span>.</cite></span>

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</ol></div></div>

<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

<li><a rel="nofollow" class="external text" href="http://tycho.usno.navy.mil/tzones.html">Time Service Dept., U.S. Naval Observatory</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20150801095742/http://tycho.usno.navy.mil/tzones.html">Archived</a> 2015-08-01 at the <a href="Wayback_Machine" title="Wayback Machine">Wayback Machine</a></li></ul>

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</style><div id="Time758" style="font-size:114%;margin:0 4em"><a href="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">

<li><a href="Present" title="Present">Present</a></li>

<li><a href="Future" title="Future">Future</a></li>

<li><a href="Eternity" title="Eternity">Eternity</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Horology" class="mw-redirect" title="Horology">Measurement</a><br>and <a href="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="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">

<li><a href="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="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="Italian_six-hour_clock" title="Italian six-hour clock">Italian six-hour clock</a></li>

<li><a href="Thai_six-hour_clock" title="Thai six-hour clock">Thai six-hour clock</a></li>

<li><a href="12-hour_clock" title="12-hour clock">12-hour clock</a></li>

<li><a href="24-hour_clock" title="24-hour clock">24-hour clock</a></li>

<li><a href="Relative_hour" title="Relative hour">Relative hour</a></li>

<li><a href="Daylight_saving_time" title="Daylight saving time">Daylight saving time</a></li>

<li><a href="Traditional_Chinese_timekeeping" title="Traditional Chinese timekeeping">Chinese</a></li>

<li><a href="Decimal_time" title="Decimal time">Decimal</a></li>

<li><a href="Hexadecimal_time" title="Hexadecimal time">Hexadecimal</a></li>

<li><a href="Hindu_units_of_time" title="Hindu units of time">Hindu</a></li>

<li><a href="Metric_time" title="Metric time">Metric</a></li>

<li><a href="Roman_timekeeping" title="Roman timekeeping">Roman</a></li>

<li><a href="Sidereal_time" title="Sidereal time">Sidereal</a></li>

<li><a href="Solar_time" title="Solar time">Solar</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:6.5em;font-weight:normal; text-align:center;"><a href="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="Calendar#Systems" title="Calendar">Main types</a>

<ul><li><a href="Solar_calendar" title="Solar calendar">Solar</a></li>

<li><a href="Lunar_calendar" title="Lunar calendar">Lunar</a></li>

<li><a href="Lunisolar_calendar" title="Lunisolar calendar">Lunisolar</a></li></ul></li>

<li><a href="Gregorian_calendar" title="Gregorian calendar">Gregorian</a></li>

<li><a href="Julian_calendar" title="Julian calendar">Julian</a></li>

<li><a href="Hebrew_calendar" title="Hebrew calendar">Hebrew</a></li>

<li><a href="Islamic_calendar" title="Islamic calendar">Islamic</a></li>

<li><a href="Solar_Hijri_calendar" title="Solar Hijri calendar">Solar Hijri</a></li>

<li><a href="Chinese_calendar" title="Chinese calendar">Chinese</a></li>

<li><a href="Hindu_calendar" title="Hindu calendar">Hindu Panchang</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:6.5em;font-weight:normal; text-align:center;"><a href="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="Clock#Types" title="Clock">Main types</a>

<ul><li><a href="Astronomical_clock" title="Astronomical clock">astronomical</a>

<ul><li><a href="Astrarium" title="Astrarium">astrarium</a></li></ul></li>

<li><a href="Atomic_clock" title="Atomic clock">atomic</a>

<ul><li><a href="Quantum_clock" class="mw-redirect" title="Quantum clock">quantum</a></li></ul></li>

<li><a href="Hourglass" title="Hourglass">hourglass</a></li>

<li><a href="Marine_chronometer" title="Marine chronometer">marine</a></li>

<li><a href="Sundial" title="Sundial">sundial</a></li>

<li><a href="Watch" title="Watch">watch</a>

<ul><li><a href="24-hour_analogue_dial" class="mw-redirect" title="24-hour analogue dial">24-hour wristwatch</a></li>

<li><a href="Mechanical_watch" title="Mechanical watch">mechanical</a></li>

<li><a href="Stopwatch" title="Stopwatch">stopwatch</a></li></ul></li>

<li><a href="Water_clock" title="Water clock">water-based</a></li></ul></li>

<li><a href="Cuckoo_clock" title="Cuckoo clock">Cuckoo clock</a></li>

<li><a href="Digital_clock" title="Digital clock">Digital clock</a></li>

<li><a href="Grandfather_clock" title="Grandfather clock">Grandfather clock</a></li>

<li><i><a href="History_of_timekeeping_devices" title="History of timekeeping devices">History</a></i>

<ul><li><i><a href="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="Chronology" title="Chronology">Chronology</a></li><li><a href="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="Astronomical_chronology" title="Astronomical chronology">Astronomical chronology</a></li>

<li><a href="Big_History" title="Big History">Big History</a></li>

<li><a href="Calendar_era" title="Calendar era">Calendar era</a></li>

<li><a href="Periodization" title="Periodization">Periodization</a></li>

<li><a href="Regnal_year" title="Regnal year">Regnal year</a></li>

<li><a href="Timeline" title="Timeline">Timeline</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="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="A_series_and_B_series" title="A series and B series">A series and B series</a></li>

<li><a href="B-theory_of_time" title="B-theory of time">B-theory of time</a></li>

<li><a href="Chronocentrism" title="Chronocentrism">Chronocentrism</a></li>

<li><a href="Duration_(philosophy)" title="Duration (philosophy)">Duration</a></li>

<li><a href="Endurantism" title="Endurantism">Endurantism</a></li>

<li><a href="Eternal_return" title="Eternal return">Eternal return</a></li>

<li><a href="Eternalism_(philosophy_of_time)" title="Eternalism (philosophy of time)">Eternalism</a></li>

<li><a href="Event_(philosophy)" title="Event (philosophy)">Event</a></li>

<li><a href="Perdurantism" title="Perdurantism">Perdurantism</a></li>

<li><a href="Philosophical_presentism" title="Philosophical presentism">Presentism</a></li>

<li><a href="Temporal_finitism" title="Temporal finitism">Temporal finitism</a></li>

<li><a href="Temporal_parts" title="Temporal parts">Temporal parts</a></li>

<li><i><a href="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>Religion</li><li>Mythology</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">

<li><a href="Destiny" title="Destiny">Destiny</a></li>

<li><a href="Immortality" title="Immortality">Immortality</a></li>

<li><a href="The_Dreaming" title="The Dreaming">Dreamtime</a></li>

<li><a href="Time_and_fate_deities" title="Time and fate deities">Time and fate deities</a>

<ul><li><a href="Father_Time" title="Father Time">Father Time</a></li></ul></li>

<li><a href="Wheel_of_time" title="Wheel of time">Wheel of time</a>

<ul><li><a href="Kalachakra" title="Kalachakra">Kalachakra</a></li></ul></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Time_perception" title="Time perception">Human experience</a><br>and <a href="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="Chronemics" title="Chronemics">Chronemics</a></li>

<li><a href="Generation_time" title="Generation time">Generation time</a></li>

<li><a href="Mental_chronometry" title="Mental chronometry">Mental chronometry</a></li>

<li><a href="Duration_(music)" title="Duration (music)">Music</a>

<ul><li><a href="Tempo" title="Tempo">tempo</a></li>

<li><a href="Time_signature" title="Time signature">time signature</a></li></ul></li>

<li><a href="Rosy_retrospection" title="Rosy retrospection">Rosy retrospection</a></li>

<li><a href="Tense%E2%80%93aspect%E2%80%93mood" title="Tense–aspect–mood">Tense–aspect–mood</a></li>

<li><a href="Time_management" title="Time management">Time management</a></li>

<li><a href="Yesterday_(time)" title="Yesterday (time)">Yesterday</a> – <a href="Present" title="Present">Today</a> – <a href="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="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="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="Geologic_time_scale" title="Geologic time scale">Geological time</a>

<li><a href="Chronozone" title="Chronozone">chron</a></li>

<li><a href="Epoch_(geology)" class="mw-redirect" title="Epoch (geology)">epoch</a></li>

<li><a href="Geological_period" class="mw-redirect" title="Geological period">period</a></li></ul></li>

<li><a href="Geochronology" title="Geochronology">Geochronology</a></li>

<li><a href="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="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="Absolute_space_and_time" title="Absolute space and time">Absolute space and time</a></li>

<li><a href="Arrow_of_time" title="Arrow of time">Arrow of time</a></li>

<li><a href="Chronon" title="Chronon">Chronon</a></li>

<li><a href="Coordinate_time" title="Coordinate time">Coordinate time</a></li>

<li><a href="Instant" title="Instant">Instant</a></li>

<li><a href="Proper_time" title="Proper time">Proper time</a></li>

<li><a href="Spacetime" title="Spacetime">Spacetime</a></li>

<li><a href="Theory_of_relativity" title="Theory of relativity">Theory of relativity</a></li>

<li><a href="Time_domain" title="Time domain">Time domain</a></li>

<li><a href="Time_translation_symmetry" class="mw-redirect" title="Time translation symmetry">Time translation symmetry</a></li>

<li><a href="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="Chronological_dating" title="Chronological dating">Chronological dating</a></li>

<li><a href="Chronobiology" title="Chronobiology">Chronobiology</a>

<ul><li><a href="Circadian_rhythm" title="Circadian rhythm">Circadian rhythms</a></li></ul></li>

<li><a href="Chemical_clock" title="Chemical clock">Clock reaction</a></li>

<li><a href="Glottochronology" title="Glottochronology">Glottochronology</a></li>

<li><a href="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">

<li><a href="Memory" title="Memory">Memory</a></li>

<li><a href="Moment_(unit)" title="Moment (unit)">Moment</a></li>

<li><a href="Space" title="Space">Space</a></li>

<li><a href="System_time" title="System time">System time</a></li>

<li><i><a href="Tempus_fugit" title="Tempus fugit">Tempus fugit</a></i></li>

<li><a href="Time_capsule" title="Time capsule">Time capsule</a></li>

<li><a href="Time_immemorial" title="Time immemorial">Time immemorial</a></li>

<li><a href="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"></span></span> Category</li>

<li><span class="noviewer" typeof="mw:File"><span title="Commons page"></span></span> <a href="https://commons.wikimedia.org/wiki/Category:Time" class="extiw external" title="commons:Category:Time">Commons</a></li></ul>

</div></td></tr></tbody></table></div>

<div class="navbox-styles"></div><div role="navigation" class="navbox" aria-labelledby="Time_measurement_and_standards342" 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"><div id="Time_measurement_and_standards342" style="font-size:114%;margin:0 4em"><a href="Time" title="Time">Time measurement</a> and <a href="Time_standard" title="Time standard">standards</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="3"><div>

<ul><li><a href="Chronometry" title="Chronometry">Chronometry</a></li>

<li><a href="Orders_of_magnitude_(time)" title="Orders of magnitude (time)">Orders of magnitude</a></li>

<li><a href="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="Coordinated_Universal_Time" title="Coordinated Universal Time">Coordinated Universal Time</a>

<li><a href="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="International_Atomic_Time" title="International Atomic Time">International Atomic Time</a></li>

<li><a href="12-hour_clock" title="12-hour clock">12-hour clock</a></li>

<li><a href="24-hour_clock" title="24-hour clock">24-hour clock</a></li>

<li><a href="Barycentric_Coordinate_Time" title="Barycentric Coordinate Time">Barycentric Coordinate Time</a></li>

<li><a href="Barycentric_Dynamical_Time" title="Barycentric Dynamical Time">Barycentric Dynamical Time</a></li>

<li><a href="Civil_time" title="Civil time">Civil time</a></li>

<li><a href="Daylight_saving_time" title="Daylight saving time">Daylight saving time</a></li>

<li><a href="Geocentric_Coordinate_Time" title="Geocentric Coordinate Time">Geocentric Coordinate Time</a></li>

<li><a href="International_Date_Line" title="International Date Line">International Date Line</a></li>

<li><a href="IERS_Reference_Meridian" title="IERS Reference Meridian">IERS Reference Meridian</a></li>

<li><a href="Leap_second" title="Leap second">Leap second</a></li>

<li><a href="Solar_time" title="Solar time">Solar time</a></li>

<li><a href="Terrestrial_Time" title="Terrestrial Time">Terrestrial Time</a></li>

<li><a href="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="Hourglass" title="Hourglass"></a></span><br><span typeof="mw:File"><a href="Time_zone" title="Time zone"></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="Ephemeris_time" title="Ephemeris time">Ephemeris time</a></li>

<li><a href="Greenwich_Mean_Time" title="Greenwich Mean Time">Greenwich Mean Time</a></li>

<li><a href="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="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="Absolute_space_and_time" title="Absolute space and time">Absolute space and time</a></li>

<li><a href="Spacetime" title="Spacetime">Spacetime</a></li>

<li><a href="Chronon" title="Chronon">Chronon</a></li>

<li><a href="Continuous_signal" class="mw-redirect" title="Continuous signal">Continuous signal</a></li>

<li><a href="Coordinate_time" title="Coordinate time">Coordinate time</a></li>

<li><a href="Cosmological_decade" class="mw-redirect" title="Cosmological decade">Cosmological decade</a></li>

<li><a href="Discrete_time_and_continuous_time" title="Discrete time and continuous time">Discrete time and continuous time</a></li>

<li><a href="Proper_time" title="Proper time">Proper time</a></li>

<li><a href="Theory_of_relativity" title="Theory of relativity">Theory of relativity</a></li>

<li><a href="Time_dilation" title="Time dilation">Time dilation</a></li>

<li><a href="Gravitational_time_dilation" title="Gravitational time dilation">Gravitational time dilation</a></li>

<li><a href="Time_domain" title="Time domain">Time domain</a></li>

<li><a href="Time-translation_symmetry" title="Time-translation symmetry">Time-translation symmetry</a></li>

<li><a href="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="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="Clock" title="Clock">Clock</a></li>

<li><a href="Astrarium" title="Astrarium">Astrarium</a></li>

<li><a href="Atomic_clock" title="Atomic clock">Atomic clock</a></li>

<li><a href="Complication_(horology)" title="Complication (horology)">Complication</a></li>

<li><a href="History_of_timekeeping_devices" title="History of timekeeping devices">History of timekeeping devices</a></li>

<li><a href="Hourglass" title="Hourglass">Hourglass</a></li>

<li><a href="Marine_chronometer" title="Marine chronometer">Marine chronometer</a></li>

<li><a href="Marine_sandglass" title="Marine sandglass">Marine sandglass</a></li>

<li><a href="Radio_clock" title="Radio clock">Radio clock</a></li>

<li><a href="Watch" title="Watch">Watch</a>

<ul><li><a href="Stopwatch" title="Stopwatch">stopwatch</a></li></ul></li>

<li><a href="Water_clock" title="Water clock">Water clock</a></li>

<li><a href="Sundial" title="Sundial">Sundial</a></li>

<li><a href="Dialing_scales" title="Dialing scales">Dialing scales</a></li>

<li><a href="Equation_of_time" title="Equation of time">Equation of time</a></li>

<li><a href="History_of_sundials" title="History of sundials">History of sundials</a></li>

<li><a href="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 href="Calendar" title="Calendar">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="Gregorian_calendar" title="Gregorian calendar">Gregorian</a></li>

<li><a href="Hebrew_calendar" title="Hebrew calendar">Hebrew</a></li>

<li><a href="Hindu_calendar" title="Hindu calendar">Hindu</a></li>

<li><a href="Holocene_calendar" title="Holocene calendar">Holocene</a></li>

<li><a href="Islamic_calendar" title="Islamic calendar">Islamic</a> (lunar Hijri)</li>

<li><a href="Julian_calendar" title="Julian calendar">Julian</a></li>

<li><a href="Solar_Hijri_calendar" title="Solar Hijri calendar">Solar Hijri</a></li>

<li><a href="Astronomical_year_numbering" title="Astronomical year numbering">Astronomical</a></li>

<li><a href="Dominical_letter" title="Dominical letter">Dominical letter</a></li>

<li><a href="Epact" title="Epact">Epact</a></li>

<li><a href="Equinox" title="Equinox">Equinox</a></li>

<li><a href="Intercalation_(timekeeping)" title="Intercalation (timekeeping)">Intercalation</a></li>

<li><a href="Julian_day" title="Julian day">Julian day</a></li>

<li><a href="Lunar_calendar" title="Lunar calendar">Lunar</a></li>

<li><a href="Lunisolar_calendar" title="Lunisolar calendar">Lunisolar</a></li>

<li><a href="Solar_calendar" title="Solar calendar">Solar</a></li>

<li><a href="Solstice" title="Solstice">Solstice</a></li>

<li><a href="Tropical_year" title="Tropical year">Tropical year</a></li>

<li><a href="Determination_of_the_day_of_the_week" title="Determination of the day of the week">Weekday determination</a></li>

<li><a href="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="Chronological_dating" title="Chronological dating">Chronological dating</a></li>

<li><a href="Geologic_time_scale" title="Geologic time scale">Geologic time scale</a></li>

<li><a href="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="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="Galactic_year" title="Galactic year">Galactic year</a></li>

<li><a href="Nuclear_timescale" title="Nuclear timescale">Nuclear timescale</a></li>

<li><a href="Precession" title="Precession">Precession</a></li>

<li><a href="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="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="Instant" title="Instant">Instant</a></li>

<li><a href="Flick_(time)" title="Flick (time)">Flick</a></li>

<li><a href="Shake_(unit)" title="Shake (unit)">Shake</a></li>

<li><a href="Jiffy_(time)" title="Jiffy (time)">Jiffy</a></li>

<li><a href="Second" title="Second">Second</a></li>

<li><a href="Minute" title="Minute">Minute</a></li>

<li><a href="Moment_(unit)" title="Moment (unit)">Moment</a></li>

<li><a href="Fortnight" title="Fortnight">Fortnight</a></li>

<li><a href="Month" title="Month">Month</a></li>

<li><a href="Olympiad" title="Olympiad">Olympiad</a></li>

<li><a href="Lustrum" title="Lustrum">Lustrum</a></li>

<li><a href="Decade" title="Decade">Decade</a></li>

<li><a href="Century" title="Century">Century</a></li>

<li><a href="Saeculum" title="Saeculum">Saeculum</a></li>

<li><a href="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="Chronology" title="Chronology">Chronology</a></li>

<li><a href="Duration_(philosophy)" title="Duration (philosophy)">Duration</a>

<ul><li><a href="Duration_(music)" title="Duration (music)">music</a></li></ul></li>

<li><a href="Mental_chronometry" title="Mental chronometry">Mental chronometry</a></li>

<li><a href="Decimal_time" title="Decimal time">Decimal time</a></li>

<li><a href="Metric_time" title="Metric time">Metric time</a></li>

<li><a href="System_time" title="System time">System time</a></li>

<li><a href="Time_metrology" class="mw-redirect" title="Time metrology">Time metrology</a></li>

<li><a href="Time_value_of_money" title="Time value of money">Time value of money</a></li>

<li><a href="Timekeeper" title="Timekeeper">Timekeeper</a></li></ul>

</div></td></tr></tbody></table></div>

<div class="navbox-styles"></div><div role="navigation" class="navbox" aria-labelledby="Coordinated_Universal_Time_(UTC)242" style="padding:3px"><table class="nowraplinks 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="Coordinated_Universal_Time_(UTC)242" style="font-size:114%;margin:0 4em"><a href="Coordinated_Universal_Time" title="Coordinated Universal Time">Coordinated Universal Time</a> (UTC)</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><span class="wrap"> for <a href="Standard_time" title="Standard time">standard time</a> and <a href="Daylight_saving_time" title="Daylight saving time">Daylight saving time</a> (DST)<br><br><i>Italics: historical or unofficial</i></span></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%"><a href="180th_meridian" title="180th meridian">180°</a> to <a href="90th_meridian_west" title="90th meridian west">90°W</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="90th_meridian_west" title="90th meridian west">90°W</a> to <a href="IERS_Reference_Meridian" title="IERS Reference Meridian">0°</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="IERS_Reference_Meridian" title="IERS Reference Meridian">0°</a> to <a href="90th_meridian_east" title="90th meridian east">90°E</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="90th_meridian_east" title="90th meridian east">90°E</a> to <a href="180th_meridian" title="180th meridian">180°</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="180th_meridian" title="180th meridian">180°</a> to <a href="90th_meridian_west" title="90th meridian west">90°W</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Time_zone" title="Time zone">Time zone</a> data sources</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"><a href="Tz_database" title="Tz database">tz database</a></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Lists_of_time_zones" title="Lists of time zones">Lists of time zones</a></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="List_of_time_zones_by_country" title="List of time zones by country">Time zones by country</a></li>

<li><a href="List_of_UTC_offsets" title="List of UTC offsets">Time zones by UTC offset</a></li>

<li><a href="Military_time_zone" title="Military time zone">Military time zone</a></li>

<li><a href="List_of_time_zone_abbreviations" title="List of time zone abbreviations">Time zone abbreviations</a></li>

<li><a href="Daylight_saving_time_by_country" title="Daylight saving time by country">Daylight saving time by country</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-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Abolition_of_time_zones" title="Abolition of time zones">Abolition of time zones</a></li></ul>

</div></td></tr></tbody></table></div>

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