Which is GMT? Fact and story.
This is the same all year round and is not influenced by summer time or summer time. It is 1200 o'clock in Greenwich at midday when the highest point of the day's sky is exactly above the prime meridian. Look at the GMT time stamp to see how exact your computer time is.
The GMT is also a time area used by the United Kingdom of Great Britain and Northern Ireland (UK) when summer time from October to March is not used. The GMT is still widely used as the default time to which all other time domains in the globe refer.
Each 15° degree of latitude corresponds to one hours time difference: If you know how many grades it is easterly or westerly of Greenwich, you can calculate the time at any place on the planet. Where' s Greenwich, England? The Greenwich meridian (prime meridian or meridian zero ) indicates the origin of each time region on the time zonecard.
See real-time watches with GMT/UTC offset for 24 time zone worldwide. Find out more about the relationship between precise timekeeping, GMT and travel. It was a regal castle and gardens on a hillside just south of the Thames just outside London.
By 1675 the great battle to produce precise navigator charts had started, and Charles II proposed the country to the Royal Society for Britain's First National Observatory. ohn Flamsteed was named Astronomer Royal. UK map makers began to adjust the longitude from Greenwich, and in 1884 it was introduced as the Prime Meridian.
However, with the advent of railwayroads in the mid-19th centuries, Britain needed a system of domestic time to substitute for the time chosen by the city. Since Greenwich, due to the Royal Observatory's attendance, was the temporal center of the country and had existed since 1675, the election was evident.
Nevertheless, the time as indicated by the Royal Observatory watches was not formally fixed by Parliament until 2 August 1880. At 12 o'clock the selected time was when the cable line sent time signal to all city. GMT was generally accepted on 1 November 1884 at the International Meridian Conference in Washington, DC, USA.
Consequently, the International Date Line was established and 24 time zone were established. Today GMT is used as Britain's citizens' time. This is the discrepancy between Universal Coordinated Time (UT1) and Universal Coordinated Time (UTC), which is kept below 0.9s by the action of leak seconds. GMT is used to measure most time shifts.
Though it has been superseded by nuclear time (UTC), it is still considered the right time for any global time area. It' also known as Zulu Time.