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Any of the roughly longitudinal divisions of the earth's surface in which a standard time is kept, the primary division being that bisected by the Prime Meridian. A typical time zone averages 15° of longitude in width and observes a clock time one hour earlier than the zone immediately to the east.
(Physical Geography) a region throughout which the same standard time is used. There are 24 time zones in the world, demarcated approximately by meridians at 15° intervals, an hour apart. See also zonetime
art at time
one of the 24 regions or divisions of the globe approximately coinciding with meridians at successive hours from the observatory at Greenwich, England.
Any of the 24 divisions of the Earth's surface used to determine the local time for any given locality. Each zone is roughly 15° of longitude in width, with local variations. Local time is one hour ahead for each time zone as one travels east, and one hour behind for each time zone as one travels west. So, for example, when it is noon in New York City, it is 11:00 a.m. in Chicago, 10:00 a.m. in Denver, and 9:00 a.m. in Los Angeles. See more at International Date Line.
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