Time zone | timezone wiki
StandardWorldTimeZonesmap(asofAugust2015)TimezonesgivespecificareasontheEarthatimeofdaythatisearlierorlaterthantheneighboringtimezones.Thisisbecausewhenitisdaytimeononesideoftheearth,itisnight-timeontheotherside.Thereare24timezonesdividingtheearthintodifferenttimes,eachwithitsownname,liketheNorthAmericanEasternTimeZone.TheNorthAmericanEasternTimeZonecontainslargecitiesinNorthAmericalikeNewYorkCityandMiami.GreenwichMeanTime(GMT)beganin1675.ThiswaswhentheRoyalObservatory,Greenwichwasbuilttohel...
Standard World Time Zones map (as of August 2015)Time zones give specific areas on the Earth a time of day that is earlier or later than the neighboring time zones. This is because when it is daytime on one side of the earth, it is night-time on the other side. There are 24 time zones dividing the earth into different times, each with its own name, like the North American Eastern Time Zone. The North American Eastern Time Zone contains large cities in North America like New York City and Miami.
Greenwich Mean Time (GMT) began in 1675. This was when the Royal Observatory, Greenwich was built to help ships find their longitude at sea. GMT was a standard reference for time keeping when each city kept a different local time. When railways began carrying many people quickly among cities keeping different time, they adopted time zones to simplify operations. By about 1900, almost all time on earth was in the form of standard time zones.
Greenwich Mean Time is now called ...