Since the prime meridian of 0 degrees longitude passes through Greenwich, England, this location is used for a universal time throughout the world. Each of the time zones are measured outward 15 degrees from the prime meridian. Thus, 1400 (2 PM) GMT is 0900 EST, 0800 CST, 0700 MST etc. GMT minus 7 hours equals MST. GMT is also called "Z" time and most NWS products, especially model guidance products, use this time.
n. The mean solar time at the prime meridian (0 degrees longitude) of Greenwich, England. Greenwich mean time is sometimes called Z time or Zulu time. Although Greenwich mean time and coordinated universal time are sometimes used interchangeably, they are not synonyms. Greenwich mean time is an approximate time. Because the second is no longer defined in terms of astronomical phenomena, the preferred name for this time scale is coordinated universal time (UTC).
Mean solar time for the meridian at Greenwich, England. Greenwich mean time is used as the basis for calculating time around the world. Greenwich time may also be referred to as Zulu or Z time.
A global standard for time. Abbreviation: GMT. Synonyms: universal time coordinated (UTC); zulu time.
Time standard based upon the Prime Meridian and used for most meteorological applications and activities. See UTC and ZULU.
Mean solar time referred to the zero meridian of longitude that passes through Greenwich, England. It is the basis for scientific and navigational purposes.
The same reference time as Universal Time (UT); the time at 0 degrees longitude (the prime meridian) that passes through Greenwich, England.
international reference time scale, based on the time zone meridian at longitude 0° (Greenwich meridian) GMT [h] Greenwich- Zeit
the time at Greenwich, Greater London, that world time zones are based on.
e Greenwichzeit (time at the prime meridian) abbreviation) e Stunde (hour) Latin hora (time, hour) gave English the word "hour" and German the word for "clock" ( Uhr). Sometimes German uses the abbreviation "h" for Uhr or "hour," as in "5h25" (5:25) or "km/h" ( Stundenkilometer, km per hour).
the local time at the 0 meridian passing through Greenwich, England; it is the same everywhere
Greenwich Mean Time is the standard for timekeeping. It was introduced in England in 1880.
(GMT). Also Greenwich civil time. Time as measured from the lower branch of Greenwich meridian to the hour circle of the mean sun. Also local apparent time at Greenwich, England. Now reported as Coordinated Universal Time [UTC].
world standard time implemented in Greenwich, England, in the 1840s. GMT, which is based on earth's motion, was succeeded by Universal Coordinated Time (UTC) in 1972.
(abbreviated GMT) - Refers to time kept on the Greenwich meridian (longitude zero). It's a colloquial term for Universal Time.
the time by the sun as measured at Greenwich, England; GMT in short
This term has been replaced with Coordinated Universal Time ( UTC).
The mean solar time for Greenwich, England, which is located on the Prime Meridian (zero longitude). Based on the rotation of the earth, GMT is used as the basis for calculating standard time throughout most of the world.
(abbreviated GMT; also called zulu time) Local mean time at the Greenwich meridian. [Local note: To convert GMT(zulu) to Central Standard Time (CST), subtract 6 hours ( subtract 5 hours during Daylight Saving Time ).
See "Universal Coordinated Time"
(GMT) - global time scale based on the local time observed on the Prime Meridian; also called Zulu (Z) time or Universal Coordinated Time (UTC)
The basis of standard time. Now commonly replaced by Coordinated Universal Time (UTC).
Mean solar time at the Greenwich meridan, used by most navigators, and adopted as the prime basis of standard time throughout the world.
A standard time used throughout the world, the correct time at Greenwich Observatory in England.
Mean solar time of the meridian at Greenwich, England, used as the basis for standard time throughout most of the world. Also referred to as Zulu (Z) and Coordinated Universal Time (UTC).
The mean solar time for the meridian at Greenwich, England, used as a basis for calculating time throughout most of the world. Also called universal time.
Time measured from Greenwich, England or 0 degrees longitude (Prime Meridian). Used as the basis for calculating standard time throughout most of the earth. Back to the top of the page...
The time at the meridian at Greenwich, England, used as the basis for standard time throughout most of the world. It is four hours ahead of Eastern Daylight Time (EDT) and five hours ahead of Eastern Standard Time (EST).
GMT for short. Coordinated universal time is the new term. A time standard that is not affected by time zones or seasons.
(GMT) - The mean solar time of the meridian of Greenwich, England, used as the basis for calculating standard time throughout the world.
Mean solar time of the meridian (line of longitude) at Greenwich, England; used as the basis for standard time throughout most of the world
The name of the twenty-four hour time scale which is used throughout the scientific and military communities. Standard Time begins at Greenwich, England, home of the Royal Observatory which first utilized this method of world time. This is also the Prime Meridian of Longitude. The globe is divided into twenty-four (24) time zones of 15 degrees of arc, or one hour in time apart. To the east of this meridian, time zones are number from 1 to 12 and prefixed with a minus (-), indicting the number of hours to be subtracted to obtain Greenwich Time (GMT). To the west, the time zones are also numbered 1 through 12, but are prefixed with a plus (+), indicating the number of hours to be added to obtain GMT. Related terms: Universal Time Coordinate (UTC) and Zulu (Z)
"Greenwich Mean Time" (GMT) is a term originally referring to mean solar time at the Royal Observatory, Greenwich in England. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, although strictly UTC is an atomic time scale which only approximates GMT in the old sense. It is also used to refer to Universal Time (UT), which is the astronomical concept that directly replaced the original GMT.