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Time in the United States. 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 observing daylight saving time (DST) for approximately the spring, summer, and fall months. The time zone boundaries and DST observance are regulated by the Department ...
Time in Arizona, as in all U.S. states, is regulated by the United States Department of Transportation [ 1] as well as by state and tribal law. All of Arizona is in the Mountain Time Zone. [ 2] Since 1968, most of the state—except the Navajo Nation —does not observe daylight saving time and remains on Mountain Standard Time (MST) all year.
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.
The time zone using UTC is sometimes denoted UTC±00:00 or by the letter Z—a reference to the equivalent nautical time zone (GMT), which has been denoted by a Z since about 1950. Time zones were identified by successive letters of the alphabet and the Greenwich time zone was marked by a Z as it was the point of origin.
This is a list of the UTC time offsets, showing the difference in hours and minutes from Coordinated Universal Time (UTC), from the westernmost (−12:00) to the easternmost (+14:00). It includes countries and regions that observe them during standard time or year-round. The main purpose of this page is to list the current standard time offsets ...
Atlantic Time Zone. DST is observed in parts of this time zone. The Atlantic Time Zone is a geographical region that keeps standard time—called Atlantic Standard Time ( AST )—by subtracting four hours from Coordinated Universal Time ( UTC ), resulting in UTC−04:00. AST is observed in parts of North America and some Caribbean islands.
UTC−2. (BRT+1) UTC−05:00 is an identifier for a time offset from UTC of −05:00. In North America, it is observed in the Eastern Time Zone during standard time, and in the Central Time Zone during the other eight months (see Daylight saving time ). The western Caribbean uses it year round.
150 degrees W. Date-time group. UTC+14:00 is an identifier for a time offset from UTC of +14:00. This is the earliest time zone on Earth, meaning that areas in this zone are the first to see a new day, and therefore the first to celebrate a New Year. It is also referred to as the "latest time zone" on Earth, as clocks in it always show the ...