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Standard time is the synchronization of clocks within a geographical region to a single time standard, rather than a local mean time standard.
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A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between ...
A time standard is a specification for measuring time: either the rate at which time passes or points in time or both. In modern times, several time ...
In the United States, time is divided into nine standard time zones covering the states, territories and other US possessions, with most of the country ...