time zones

Definition/Scope: Geographical region within which the same standard time is used. A zone on the terrestrial globe that is approximately 15 longitude wide and extends from pole to pole and within which a uniform clock time is used. Time zones are the functional basis of standard time.

Broader Terms:

official US regions

Narrower Terms:

Alaska standard time zone
Atlantic daylight time
Atlantic standard time zone
Central daylight time
Central standard time zone
daylight saving time
Eastern standard time zone
Hawaii standard time
Hawaii-Aleutian daylight time
Hawaii-Aleutian standard time zone
Mountain standard time zone
Newfoundland standard time zone
Pacific daylight time
Pacific standard time zone

Related Terms:

coordinated universal time
standard time
time