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Time. UTC to GMT, GMT to UTC calculator, difference

 
Difference between UTC and GMT is less than 1 second
UTC = GMT = UT1 with precision 1 second
So in daily life they are EQUAL.

Coordinated Universal Time (UTC) is the time standard by which the world regulates clocks and time. Computer servers, online services and other entities that rely on having a universally accepted time use UTC for that purpose. UTC is a time standard based on International Atomic Time (TAI) with leap seconds added at irregular intervals to compensate for the Earth's slowing rotation. Leap seconds are used to allow UTC to closely track UT1, which is mean solar time at the Royal Observatory, Greenwich.

Greenwich Mean Time (GMT) is a term originally referring to mean solar time at the Royal Observatory in Greenwich, London. It is arguably the same as Coordinated Universal Time (UTC)

Universal Time (UT) is a timescale based on the rotation of the Earth. It is a modern continuation of Greenwich Mean Time (GMT), i.e., the mean solar time on the Prime Meridian at Greenwich, and GMT is sometimes used loosely as a synonym for UTC.

UT1 is the principal form of Universal Time. While conceptually it is mean solar time at 0° longitude, precise measurements of the Sun are difficult. Hence, it is computed from observations of distant quasars using long baseline interferometry, laser ranging of the Moon and artificial satellites, as well as the determination of GPS satellite orbits.

UTC replaced GMT as the basis for the main reference time scale or civil time in various regions on 1 January 1972. In casual use, when fractions of a second are not important, Greenwich Mean Time (GMT) can be considered equivalent to UTC or UT1. Saying "GMT" often implies either UTC or UT1 when used within informal or casual contexts. In technical contexts, usage of "GMT" is avoided; the unambiguous terminology "UTC" or "UT1" is preferred. 
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Guest:
Hi

UTC and GMT are equal with precissin of one second

2013-06-07 11:13:21
Guest:
Hi

UTC stands for Universal Time and GMT is known as Greenwich Mean Time. GMT is 0 hours ahead of UTC. So, when it is 10:00 PM UTC it will be 10:00 PM GMT. 


2013-06-07 11:13:21

 Use username: Guest, Anonymous, Programmer






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