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the civil time officially adopted for a country or region, usu. the civil time of some specific meridian lying within the region, with a difference of exactly one hour between one zone and the next. The standard time zones in the U.S. are Atlantic time, Eastern time, Central time, Mountain time, Pacific time, Alaska time,Hawaii-Aleutian time, and Samoa time.
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|Noun||1.||Atlantic Time - standard time in the 4th time zone west of Greenwich, reckoned at the 60th meridian; used in Puerto Rico and the Virgin Islands and Bermuda and the Canadian Maritime Provinces|