time zonetime zone
any of the 24 longitudinal regions of the earth, each occupying 15 degrees and having a mean solar time one hour greater than that of the neighboring region to the west
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.
- Alternative form of time zone.