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Daylight saving time (DST) is in effect in much of the Central time zone between mid-March and early November. The modified time is called "Central Daylight Time" (CDT) and is UTC−05:00 . In the United States, all time zones that observe DST were effectively changed by the Energy Policy Act of 2005. Beginning in 2007, DST would now begin at 2 ...
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.
Chamorro Time Zone. UTC+10 highlighted on a world map. The Chamorro Time Zone, [1] formerly the Guam Time Zone, is a United States time zone which observes standard time ten hours ahead of Coordinated Universal Time ( UTC+10:00 ). The clock time in this zone is based on the mean solar time of the 150th meridian east of the Greenwich Observatory .
El concepto de huso horario surge de la forma de la Tierra, su movimiento de rotación y del sistema de 24 horas diarias. Como la Tierra es esférica, el Sol no ilumina toda la superficie simultáneamente. En cada instante, el Sol ilumina solamente una mitad (un hemisferio) donde es de día, dejando la otra a oscuras ( noche ).
Military time zone. The military time zones are a standardized, uniform set of time zones for expressing time across different regions of the world, named after the NATO phonetic alphabet. The Zulu time zone (Z) is equivalent to Coordinated Universal Time (UTC) and is often referred to as the military time zone.
Prior to 1983, the current Alaska Time Zone (UTC−09:00) was known as the Yukon Time Zone, observing Yukon Standard Time (YST). This time zone included Canada's Yukon Territory and a small portion of Alaska including Yakutat. The Alaska Panhandle communities were in the Pacific Time Zone, while most of the interior was on UTC−10:00. [6]
