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  2. Coordinated Universal Time - Wikipedia

    en.wikipedia.org/wiki/Coordinated_Universal_Time

    Current time zones. Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce.

  3. Leap second - Wikipedia

    en.wikipedia.org/wiki/Leap_second

    Screenshot of the UTC clock from time.gov during the leap second on 31 December 2016.. A leap second is a one-second adjustment that is occasionally applied to Coordinated Universal Time (UTC), to accommodate the difference between precise time (International Atomic Time (TAI), as measured by atomic clocks) and imprecise observed solar time (), which varies due to irregularities and long-term ...

  4. Time synchronization in North America - Wikipedia

    en.wikipedia.org/wiki/Time_synchronization_in...

    The methods below provide either Coordinated Universal Time (UTC), which is defined by Recommendation ITU-R TF.460, [3] or the official U.S. implementation of UTC, officially labeled UTC (NIST). Internet time sources

  5. GPS signals - Wikipedia

    en.wikipedia.org/wiki/GPS_signals

    GPS time is expressed with a resolution of 1.5 seconds as a week number and a time of ... and information to relate GPS derived time to Coordinated Universal Time ...

  6. International Earth Rotation and Reference Systems Service

    en.wikipedia.org/wiki/International_Earth...

    UT1 is the non-uniform time defined based on the Earth's rotation. It defined the IERS Reference Meridian, the International Terrestrial Reference System (ITRS), and subsequent International Terrestrial Reference Frames (ITRF). Related coordinate systems are used by satellite navigation systems like GPS and Galileo: WGS84 and GTRF. The ...

  7. List of UTC offsets - Wikipedia

    en.wikipedia.org/wiki/List_of_UTC_offsets

    This is a list of the UTC time offsets, showing the difference in hours and minutes from Coordinated Universal Time (UTC), from the westernmost (−12:00) to the easternmost (+14:00). It includes countries and regions that observe them during standard time or year-round.

  8. Timation - Wikipedia

    en.wikipedia.org/wiki/Timation

    The solution, developed by John Harrison, was an accurate clock which could compare local time to Greenwich, England time. To this day, Coordinated Universal Time (UTC), the successor of Greenwich Mean Time (GMT), is the reference time for the planet, and in the United States, the official time for the Department of Defense (DoD) is kept by the ...

  9. UTC+00:00 - Wikipedia

    en.wikipedia.org/wiki/UTC+00:00

    This time zone is the basis of Coordinated Universal Time (UTC) and all other time zones are based on it. In ISO 8601, an example of the associated time would be written as 2069-01-01T12:12:34+00:00. It is also known by the following geographical or historical names: Greenwich Mean Time [1] Western European Time [1] Azores Summer Time [1]

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