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Time zone abbreviations for both Standard Time and Daylight Saving Time are shown exactly as they appear in the database. See strftime and its "%Z" field. Some of zone records use 3 or 4 letter abbreviations that are tied to physical time zones, others use numeric UTC offsets.
This is a list of time zone abbreviations. ... Greenwich Mean Time (GMT) :: UTC : Archived 2013-05-08 at the Wayback Machine; MHonArc Resources: TIMEZONES;
Principal cities: Mexico City, Chicago, Guatemala City, Tegucigalpa, Winnipeg, San José, San Salvador. Belize [18] Canada (Central Time Zone) Manitoba; Nunavut [17] Area between 85th meridian west and 102nd meridian west, except Southampton Island and adjoining islands, and all of Kitikmeot Region; Ontario. West of 90° west [19] Saskatchewan
Map of U.S. time zones with new CST and EST areas displayed. Some U.S. time zones, such as the Samoa Time Zone, are not on this map. This is a list of the time offsets by U.S. states, federal district, and territories. For more about the time zones of the U.S. see time in the United States. Most states are entirely contained within one time zone.
The conference therefore established the Greenwich Meridian as the prime meridian and Greenwich Mean Time (GMT) as the world's time standard. The U.S. time-zone system grew from this, in which all zones referred back to GMT on the prime meridian. [2]
UTC−08:00 – Pacific Time zone: the Pacific coast states, the Idaho Panhandle and most of Nevada and Oregon UTC−07:00 – Mountain Time zone: most of Idaho, part of Oregon, and the Mountain states plus western parts of some adjacent states UTC−06:00 – Central Time zone: a large area spanning from the Gulf Coast to the Great Lakes
Time zones of the world. 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 countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.
A timezone is different from a region with a particular standard time offset from UTC, which is often referred to as a "time zone". Therefore, each of the timezones defined by the tz database may use multiple offsets from UTC, such as offsets for standard time and daylight saving time .