Difference between utc and gmt

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difference between utc and gmt

Understanding Universal Coordinated Time (UTC)

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Weather observations around the world including surface, radar, and other observations are always taken with respect to a standard time. It is also known as "Z time" or "Zulu Time". To obtain your local time here in the United States, you need to subtract a certain number of hours from UTC depending on how many time zones you are away from Greenwich England. The table below shows the standard difference from UTC time to local time. The switch to daylight saving time does not affect UTC.

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Setup a private space for you and your coworkers to ask questions and share information. To quote timeanddate. When the sun is at its highest point exactly above Greenwich, it is 12 noon GMT. Except: The Earth spins slightly unevenly, so 12 noon is defined as the annual average, mean of when the sun is at its highest, its culmination.

Coordinated Universal Time abbreviated to UTC is the primary time standard by which the world regulates clocks and time.
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When you read weather forecasts and maps , you may notice a four-digit number followed by the letter "Z" somewhere at their bottom or top. All three are time standards in the weather community and keep meteorologists —regardless of where in the world they forecast from—using the same hour clock, which helps avoid confusion when tracking weather events between time zones. Although the three terms are used interchangeably, there are small differences in meaning. Here, the word "mean" means "average. Because of Earth's uneven speed in its elliptical orbit and it's axial tilt, noon GMT isn't always when the sun crosses the Greenwich meridian.


Greenwich Mean Time GMT is a term originally referring to mean solar time at the Royal Observatory, Greenwich where a system was first developed around for tracking time based on the rotation of the Earth. The ITU felt it was best to designate a single abbreviation for use in all languages in order to minimize confusion. -


The Difference Between GMT and UTC







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