Weather forecasts and maps all use UTC to avoid confusion about time zones and daylight saving time. for flight plans and air traffic control clearances.
UTC is also the time standard used in aviation, e.g. REFERENCE: A Briefer History of Time - Howard Barnes, Georgi. For sub-microsecond precision, clients can obtain the time from satellite signals. UTC - civil atomic time scale on or about the Greenwich meridian kept within 0.9 seconds of UT1. If only milliseconds precision is needed, clients can obtain the current UTC from a number of official internet UTC servers. The Network Time Protocol (NTP), designed to synchronize the clocks of computers over the Internet, transmits time information from the UTC system. UTC is used in many Internet and World Wide Web standards. Several jurisdictions have established time zones that differ by an odd integer number of half-hours or quarter-hours from UT1 or UTC.Ĭurrent civil time in a particular Time Zone can be determined by adding or subtracting the number of hours and minutes specified by the UTC offset, which ranges from UTC-12 in the west to UTC+14 in the east (see our interactive map for more details). Time zones are usually defined as differing from UTC by an integer number of hours, although the laws of each jurisdiction would have to be consulted if sub-second accuracy was required. Date.UTC() is an ECMAScript1 (ES1) feature. UTC time is the same as GMT time (Greenwich Mean Time). Time Zones around the World are expressed using positive or negative offsets from UTC, as in the List of Time Zones by UTC offset. UTC (Universal Time Coordinated) is the time set by the World Time Standard. In some countries where English is spoken, the term Greenwich Mean Time (GMT) is often used as a synonym for UTC and predates UTC by nearly 300 years. You will often see time zones represented similar to UTC - 5h or GMT - 5h. It is within about 1 second of mean solar timeat Prime meridian, and is not adjusted for Daylight Saving Time. Coordinated Universal Time replaced the use of Greenwich Mean Time (GMT) in 1972. Coordinated Universal Time (abbreviated to UTC) is the primary time standard by which the world regulates clocks and time.
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