Coordinated Universal Time definition of Coordinated Universal Time in the Free Online Encyclopedia.

(time, standard)

Coordinated Universal Time - (UTC, World Time) The standard time common to every place in the world. UTC is derived from International Atomic Time (TAI) by the addition of a whole number of "leap seconds" to synchronise it with Universal Time 1 (UT1), thus allowing for the eccentricity of the Earth's orbit, the rotational axis tilt (23.5 degrees), but still showing the Earth's irregular rotation, on which UT1 is based.

Coordinated Universal Time is expressed using a 24-hour clock and uses the Gregorian calendar. It is used in aeroplane and ship navigation, where it also sometimes known by the military name, "Zulu time". "Zulu" in the phonetic alphabet stands for "Z" which stands for longitude zero.

UTC was defined by the International Radio Consultative Committee (CCIR), a predecessor of the ITU-T. CCIR Recommendation 460-4, or ITU-T Recommendation X.680 (7/94), contains the full definition.

The language-independent international abbreviation, UTC, is neither English nor French. It means both "Coordinated Universal Time" and "Temps Universel Coordonné".

BIPM.

The Royal Observatory Greenwich.

History of UTC and GMT.

U.S. National Institute of Standards & Technology.

UK National Physical Laboratory.

US Naval Observatory.

International Telecommunications Union.

Earth's irregular rotation.

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No references found	And so, at exactly 23:59:59 Greenwich Mean Time (GMT) -- or Coordinated Universal Time (UTC), to the scientifically literate -- on December 31, the world's clocks will add a beat to their metronomic tick tick tock. New Year on hold: leap second makes time stand still by AFP / AFP Global Edition Naval Observatory is going to add a "leap second" to the world's clocks at 23 hours, 59 minutes and 59 seconds Coordinated Universal Time (UTC) on December 31, 2008. "Leap second" to be added to world's clocks on December 31 by Asian News International Today's time system is called Coordinated Universal Time (UTC). Time zones: what time is it in London, England, when U.S. kids on the ... by Junior Scholastic	Coopers Ware Coopers' Dance Cooperstown coopetition COORD coordinate coordinate addressing coordinate axes coordinate basis coordinate bond coordinate conversion coordinate data receiver coordinate data transmitter coordinate indexing Coordinate Measuring Device coordinate plotter coordinate storage coordinate system coordinate systems coordinate transformation coordinate valence Coordinate-Measuring Machine coordinated complex coordinated geometry coordinated transpositions Coordinated Universal Time coordinated-axis control Coordinates Coordinating Committee for Intercontinental Research Networks Coordinating Computation Center coordinating holes Coordination coordination chemistry coordination complex Coordination Compound coordination language coordination lattice Coordination Number coordination polygon coordination polyhedron coordination polymer Coordinatograph coordinator Coorg Coornhert, Dirck Volckertszoon Coornhert, Dirk Volkertszoon coorongite Coors, Adolph Coos Coos Bay Coos County	Coordinated School Health Program Coordinated School Health Program Office Coordinated School Health Team Coordinated Science Laboratory Coordinated Seismic Experiment in the Azores Coordinated Ship Development Plan Coordinated Ship Electronic Design Coordinated Shipboard Allowance List Coordinated Shore Based Allowance List Coordinated Shore Material Allowance List Coordinated Shore-Based Material/Maintenance Allowance List Coordinated Spam Reduction Initiative Coordinated Specification Analysis Coordinated Standard ASW Exercise Coordinated Standards Document Coordinated Survey Information Network Exchange Coordinated Test Plan/Program Coordinated Timing Network Coordinated Transfer Application System Coordinated Transportation Service Agency Coordinated Transportation Services Agency coordinated transpositions Coordinated Turn Model Coordinated Undefined Moving Others Coordinated Universal Time Coordinated Video Timings Coordinated Video Timings Coordinated Vocational Academic Education Coordinated Vulnerability Disclosure Coordinated Water Supply Program Coordinated Waterbird Counts Coordinated Youth and Human Services Coordinated Youth Services Council coordinated-axis control coordinately coordinately coordinately coordinateness coordinateness coordinateness coordinates coordinates coordinates coordinates Coordinates Definitions and Notations Coordinateur Automatique de Trafic Aérien Coordinateur Sécurité Coordinatie Van Brusselse Instellingen Coordinatiecentrum Expertise Militaire Gezondheidszorg Coördinatiecommissie Internationale Culturele Betrekkingen Coordinatiecommissie Uitvoering Wet Verontreniging Oppervlaktewater Coördinatiepunt Assessment en Monitoring coordinating coordinating coordinating

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And so, at exactly 23:59:59 Greenwich Mean Time (GMT) -- or Coordinated Universal Time (UTC), to the scientifically literate -- on December 31, the world's clocks will add a beat to their metronomic tick tick tock.

New Year on hold: leap second makes time stand still by AFP / AFP Global Edition

Naval Observatory is going to add a "leap second" to the world's clocks at 23 hours, 59 minutes and 59 seconds Coordinated Universal Time (UTC) on December 31, 2008.

"Leap second" to be added to world's clocks on December 31 by Asian News International

Today's time system is called Coordinated Universal Time (UTC).

Time zones: what time is it in London, England, when U.S. kids on the ... by Junior Scholastic

coordinate addressing

coordinate axes

coordinate basis