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Greenwich
Longitude 0° 0' 0" Greenwich, England has been the home of Greenwich Mean Time (GMT) since 1884. GMT is sometimes called Greenwich Meridian Time because it is measured from the Greenwich Meridian Line at the Royal Observatory in Greenwich. Greenwich is the place from where all time zones are measured. The Greenwich Meridian (Prime Meridian or Longitude Zero degrees) marks the starting point of every time zone in the World. GMT is Greenwich Mean (or Meridian) Time is the mean (average) time that the earth takes to rotate from noon-to-noon. Greenwich Mean Time is international time, the basis of the world time clock. GMT marks precision time and military time (sometimes called Zulu Time). Defines date and time and the exact time. |
