USA Time Zone
In USA there are 9 time zones. There are forty-eight adjoining US states but that stands divided among four time zones:
PST- Pacific standard time, which is found in Los Angeles.
MST-Mountain Standard time and it is seven hours less than that of GMT.
EST-Eastern Standard time, the time zone found in New York which is 5 hours less than that of GMT.
CST-Central Standard time, the time zone found in Chicago and it is six hours less than that of GMT.
These are the basic time zones of American states but apart from that there are states like Hawaii and Alaska which have got their own time zone, HST- Hawaii Standard Time zone and AST- Alaska Time zone accordingly.
The Daylight Saving starts from 2a.m in the most states of America on the first Sunday of the month April. And the time transpose at the standard time of 2a.m on the October month, of its last Sunday.