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The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d with OpenStreetMap data, using open source software. [1] This is a list of time zones from release 2025a of the tz database. [2]
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.
UTC−07:00 is an identifier for a time offset from UTC of −07:00. In North America, it is observed in the Mountain Time Zone during standard time, and in the Pacific Time Zone during the other eight months (see Daylight saving time). Some locations use it year-round.
An hour of syndicated programming time (between 7:00 and 8:00 p.m. in the Eastern and Pacific time zones) is lost in the Central and Mountain time zones since network primetime in those areas starts at 7:00 p.m., forcing stations in Mountain or Central time (or in parts of both zones) to choose between airing their 6:00 p.m. newscast and ...
In the United States and Canada, the Mountain Time Zone is to the east of the Pacific Time Zone and to the west of the Central Time Zone. In some areas, starting in 2007, the local time changes from MST to MDT at 2 am MST to 3 am MDT on the second Sunday in March and returns at 2 am MDT to 1 am MST on the first Sunday in November.
Like other Canadian provinces that observe daylight time, British Columbia adopted the same dates in April 2006, to take effect in March 2007 alongside the U.S. [12] Several Mexican states, including Baja California, implemented the new dates for the daylight time changes in 2010, ending a three-year period where cities across the Mexico ...
Hawaii stays on Hawaiian Standard time year round, Arizona stays on Mountain Standard time year round except for the Navajo Nation which observes Mountain Daylight Time (MDT). Since 2007, in areas of Canada and the United States in which it is used, daylight saving time begins on the second Sunday of March and ends on the first Sunday of November.
Philippine Daylight Saving Time: July 1, 1954 – March 21, 1978 GMT/UTC+08:00: Philippine Standard Time: March 22, 1978 – September 20, 1978 UTC+09:00: Philippine Daylight Saving Time: September 21, 1978 – May 20, 1990 UTC+08:00: Philippine Standard Time: May 21, 1990 – July 28, 1990 UTC+09:00: Philippine Daylight Saving Time: July 29 ...