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  2. 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.

    • International Atomic Time

      International Atomic Time (abbreviated TAI, from its French...

    • Ephemeris Time

      The term ephemeris time (often abbreviated ET) can in...

    • Time zone

      Each time zone is defined by a standard offset from...

    • UTC offset

      The UTC offset (or time offset) is an amount of time...

  3. Coordinated Universal Time (or UTC) is the standard time system of the world. It is the standard by which the world regulates clocks and time. It is, within about 1 second, mean solar time at 0° longitude. The standard before was Greenwich Mean Time (GMT). UTC and GMT are almost the same.

  4. Mar 28, 2024 · Coordinated Universal Time (UTC), international basis of civil and scientific time, which was introduced on January 1, 1960. The unit of UTC is the atomic second, and UTC is widely broadcast by radio signals. These signals ultimately furnish the basis for the setting of all public and private.

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