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The Central Time Zone observes standard time by subtracting six
hours from UTC during standard time (UTC-6) and five hours during daylight saving
time (UTC-5). The clock time in this zone is based on the mean solar time of the
90th degree meridian west of the Greenwich Observatory.
In the United States and Canada, this time zone is generically
called Central Time (CT). Specifically, it is Central Standard Time (CST) when
observing standard time (Winter), and Central Daylight Time (CDT) when observing
daylight saving (Summer).
The zone is two hours ahead of the
Pacific Time Zone, one hour
ahead of the Mountain Time Zone
and one hour behind the Eastern Time Zone.
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