Coordinated Universal Time
Coordinated Universal Time (UTC)
Coordinated Universal Time (UTC) is the primary time standard by which the world regulates clocks and time. It is within about 1 second of mean solar time at 0° longitude, and is not adjusted for daylight saving time. It is effectively a successor to Greenwich Mean Time (GMT).
Pronunciation
Coordinated Universal Time is pronounced as /ˌkoʊˌɔːrˈdeɪnɪd ˈjuːnɪˌvɜːrsəl ˈtaɪm/
Etymology
The term "Coordinated Universal Time" was officially introduced in 1967. The system has been adjusted several times, including a brief period where the time-coordination radio signals broadcast both UTC and "Stepped Atomic Time (SAT)" before a new UTC was introduced in 1972 that resolved discrepancies between time scales.
Related Terms
- Atomic clock
- Greenwich Mean Time (GMT)
- International Atomic Time (TAI)
- Leap second
- Time zone
- Universal Time (UT)
See also
References
External links
- Medical encyclopedia article on Coordinated Universal Time
- Wikipedia's article - Coordinated Universal Time
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