Why don't Arizona and Hawaii participate in Daylight Saving Time?
ArizonaWhen Congress passed the Uniform Time Act in 1966, Arizona tried observing daylight savings for a year and decided to not observe it after much negative reaction. They have never observed daylight savings since.
During daylight saving time (spring through fall), Arizona is on Pacific time. All other months of the year they observe Mountain time. The only exception in Arizona is the Navajo Nation, in northeastern Arizona, which does observe Daylight Saving Time.
HawaiiHawaii is closer to the equator and experiences much less variance in daylight than the rest of the country and therefore opts out of observing Daylight Saving Time.
In North America, most of the US and much of Canada observe Daylight Saving Time and in Europe, most of Western Europe observes Daylight Saving Time but there are notable exceptions such as Arizona and Hawaii in the US, Saskatchewan and parts of Ontario in Canada and Iceland. Please see the related links and the related question for more information.
The two US states that don't observe Daylight Saving Time are Arizona and Hawaii. Daylight Saving Time is also NOT observed in Hawaii, American Samoa, Guam, Puerto Rico, the US Virgin Islands, and the Northern Marianas. In Arizona, the Navajo Indian Reservation does observe DST. The Navajo Nation participates in the Daylight Saving Time policy due to its large size and location in three states.
Two U.S. states currently do not observe daylight saving time: Arizona (except the Navaho Nation) and Hawaii. The U.S. territories in the Pacific and the Caribbean also do not observe daylight saving time. Until 2006 or 2007, much of Indiana did not observe daylight saving time, but that is no longer the case.
Since 2006, there are only two U. S. states that do not observe Daylight Saving Time, Hawaii and Arizona. The last time the clocks changed in most of Arizona was when Daylight Saving Time ended on 29 October 1967. The last time the clocks in Hawaii changed was when their time zone changed from UTC - 10.5 hours to UTC - 10 hours on 8 June 1947.