gmt full form

The full form of GMT is Greenwich Mean Time. GMT is the Mean Solar Time at Greenwich London’s Royal Observatory. It is measured at the Earth’s meridian that is a longitude line of zero degrees. These lines run from the north to south Pole, i.e. going through London’s Old Royal Observatory, Greenwich.

A brief history of GMT

  • The British Parliament did not formally adopt GMT until 2 August 1880.
  • The USA ratified it on 18th November 1883.
  • In the 1884 International Meridian Conference, GMT was incorporated internationally, and 24 time zones were created.
  • GMT is used today as the civil time or UTC of the United Kingdom.