GMT (Greenwich Mean Time)
GMT (Greenwich Mean Time) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as Coordinated Universal Time (UTC) and is used as the basis for the world’s civil time zones. GMT is the time zone of the 0° longitude line, which passes through the Royal Observatory in Greenwich, London, England. It is the same as Coordinated Universal Time (UTC) and is used as the basis for the world’s civil time zones.
History of GMT
GMT was first established in 1675 by Sir Christopher Wren, the Astronomer Royal at the Royal Observatory in Greenwich, London. It was used as the basis for the world’s civil time zones and was adopted by the International Meridian Conference in 1884. GMT was replaced by Coordinated Universal Time (UTC) in 1972, but is still used as the basis for the world’s civil time zones.
Comparison of GMT and UTC
| GMT | UTC |
|---|---|
| Mean solar time at the Royal Observatory in Greenwich, London | Coordinated Universal Time |
| Time zone of the 0° longitude line | Time zone of the 0° longitude line |
| Adopted by the International Meridian Conference in 1884 | Replaced GMT in 1972 |
Summary
GMT (Greenwich Mean Time) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as Coordinated Universal Time (UTC) and is used as the basis for the world’s civil time zones. GMT was first established in 1675 and was adopted by the International Meridian Conference in 1884. It was replaced by UTC in 1972, but is still used as the basis for the world’s civil time zones. For more information about GMT, you can visit the websites of the Royal Observatory in Greenwich, the International Meridian Conference, and the World Time Zone website.
See also
- UTC
- International Meridian Conference
- World Time Zone
- Solar Time
- Time Zone
- Longitude
- Latitude
- Daylight Saving Time
- Time Standard
- Time Zone Abbreviation
