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The Uniform Time Act of 1966 established a uniform set of rules for states opting to observe daylight saving time. [ 1] In the U.S., daylight saving time starts on the second Sunday in March and ends on the first Sunday in November, with the time changes taking place at 2:00 a.m. local time. With a mnemonic word play referring to seasons ...
Daylight saving time by country. Daylight saving time (DST), also known as summer time, is the practice of advancing clocks during part of the year, typically by one hour around spring and summer, so that daylight ends at a later time of the day. As of 2024, DST is observed in most of Europe, most of North America and parts of Africa and Asia ...
Daylight saving time ( DST ), also referred to as daylight saving (s), daylight savings time, daylight time ( United States and Canada ), or summer time ( United Kingdom, European Union, and others), is the practice of advancing clocks to make better use of the longer daylight available during summer so that darkness falls at a later clock time ...
The Uniform Time Act, passed in 1966, allowed states in the U.S. to choose whether they would participate in daylight savings. As a result, daylight saving time is not observed in Hawaii, American ...
Establishing either permanent standard or daylight saving time (DST) eliminates the practice of semi-annual clock changes, specifically the advancement of clocks by one hour from standard time to DST on the second Sunday in March (commonly called "spring forward") and the retraction of clocks by one hour from DST to standard time on the first Sunday in November ("fall back").
Daylight saving time in the Americas. Daylight saving time in the Americas is the arrangement in the Americas by which clocks are advanced by one hour in spring and moved back in autumn, to make the most of seasonal daylight. The practice is widespread in North America, with most of Canada and the United States participating, but much less so ...
Time zones of the world. In the table below, the locations that use daylight saving time (DST) are listed in their UTC offset when DST is not in effect. When DST is in effect, approximately during spring and summer, their UTC offset is increased by one hour (except for Lord Howe Island, where it is increased by 30 minutes).
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.