World Clock

Thế giới Đồng hồ để biết thời gian trên thế giới

anybody in the world wants the sun to be at its highest point inside the sky (crossing the meridian) at midday. If there were just one time region, this would be not possible due to the fact the Earth rotates 15 ranges each hour. The idea at the back of a couple of time zones is to divide the arena into 24 15-degree slices and set the clocks therefore in each sector. all of the human beings in a given region set their clocks the equal way, and every sector is one hour one-of-a-kind from the subsequent. within the continental america there are 4 time zones (click on right here for a map): jap, critical, Mountain and Pacific. when it's far noon within the japanese time zone, it's miles eleven a.m. inside the significant time sector, 10 a.m. inside the Mountain time zone and nine a.m. within the Pacific time zone. preserve reading underneath All time zones are measured from a start line targeted at England's Greenwich Observatory. This factor is referred to as the Greenwich Meridian or the high Meridian. Time at the Greenwich Meridian is known as Greenwich mean Time (GMT) or customary Time. The eastern time quarter inside the united states is special as GMT minus 5 hours. while it's far midday inside the eastern time region, it's far 5 p.m. at the Greenwich Observatory. The worldwide Date Line (IDL) is located on the alternative facet of the planet from the Greenwich Observatory. Why is the Greenwich Observatory any such massive deal? a gaggle of astronomers declared the Greenwich Observatory to be the high meridian at an 1884 convention. what is humorous is that the observatory moved to Sussex inside the 1950s, however the original website online stays the prime meridian.