GMT = Greenwich Mean Time
The Greenwich Mean Time (in G.B.) is Universal Time (UT) along the meridian of the same name in 1911 when the land is divided into 24 equal parts of 15 and limited by meridians and that will be called
time Zone .
But the scientists did not take into account the rotation of the earth in their calculations. Now the Earth is disturbed by the forces of nature and its rotation is not always equal influence among other sunshine. And rotation of the earth is the basis for calculating the universal time.
So in 1975 the
Coordinated Universal Time (UTC) is created and does not take into account the rotation of the earth. These hours UTC is governed by the International Bureau of Weights and Measures, located in France, Pavillon de Breteuil (Sevres). The UTC is provided by atomic clocks around the world, according to the International Atomic Time (TAI).
The Coordinated Universal Time (UTC) is actually exactly the same as Greenwich, but has, unlike the latter, at midnight, not noon.
From the Greenwich meridian, time zones are numbered from 0 to 23. When passing the twelfth time, we must necessarily take a day at universal calendar. The twelfth time, for its part, crosses the Pacific Ocean away from the Greenwich Meridian and lies on the meridian 180 °. Time zones were determined according to the internal administrative boundaries and the administrative track in each country, so they are not necessarily geometric.
The other time of United States
Other countries in the world
|Central African Republic|
|Congo, Democratic Republic|
|To see more ... Africa|
|French Southern Territories|
|Heard and McDonald Islands|
|South Georgia and South Sandwich Islands|
|British Indian Ocean Territory|
|Cocos (Keeling) Islands|
|To see more ... Asia|
|To see more ... Europe|
|Antigua and Barbuda|
|British Virgin Islands|
|To see more ... North America|
The main cities requested
|City||Country||Number of requests|
|New York||United States||628|
|San Francisco||United States||300|
|Los Angeles||United States||250|
|London||United Kingdom (Great Britain and Northern Ireland)||245|