The law stated that DST was to be used from April 1 to September 30. On April 1, 1944, an emergency law was passed to establish Mountain Time and Pacific Time as the state’s time zones. In 1942, during World War II, President Franklin Delano Roosevelt introduced another period of War Time, and on February 9, 1942, most of Arizona moved to Mountain War Time, again with the few western border communities observing Pacific War Time.īut, on Januwhen most of Arizona returned to MST, the western border communities remained on Pacific War Time, while railroads, airlines, bus lines, military personnel, and interstate commerce continued to use Mountain War Time in line with a federal law. The Yuma County communities in Arizona observed PDT from Mauntil October 30, 1921. Like the year before, most of the state added 1 hour to MST, with the western border locations adding 1 hour to PST. The next year, Arizona joined the rest of the country for War Time from March 30 to October 26, 1919. The communities along the state’s western border added 1 hour to Pacific Standard Time (PST) and used what is known today as Pacific Daylight Time (PDT). When the War Time period ended, most of Arizona, including Phoenix, returned to MST. The state capital Phoenix and most of Arizona added 1 hour to Mountain Standard Time (MST) to what today is known as Mountain Daylight Time (MDT). Communities in the far west of the state, near California, used Pacific Time while the rest of Arizona observed Mountain Time. Also known as War Time, DST was used in Arizona from March 31 to October 27, 1918.Īt that time, Arizona had 2 time zones. War Time DSTĪrizona used DST, along with the rest of the US, during World War I in an effort to conserve fuel for the war. The argument against extending the daylight hours into the evening is that people prefer to do their activities in the cooler evening temperatures. If DST is observed, the state has to schedule DST in sync with the rest of the US: From the second Sunday in March until the first Sunday in November.īecause of Arizona’s hot climate, DST is largely considered unnecessary. The Act gives every state or territory the right to decide if it wants to use DST. Opted Out of DSTĪrizona is exempt from DST according to the US Energy Policy Act of 2005. Jeddito (Navajo), in the middle of Hopi Nation territory, is 1 hour ahead of the surrounding areas during summer.
In addition to this, there is another Hopi area adjacent to the main Hopi Nation territory.Īs a result, if driving the correct route from the Arizona state border through both Navajo and Hopi areas to the other side you can end up changing your clock 7 times! For example: Tuba City (Navajo) and Moenkopi (Hopi) are only a couple of miles apart, but they have a 1-hour time difference during the summer. To confuse matters more, there is also an even smaller Navajo Nation territory within the Hopi Nation within the Navajo Nation. Navajo Nation Council Chamber in Window Rock, Arizona: The Navajo Nation uses DST when the rest of the state does not.Ī part of the Hopi Nation, which lies within the Navajo Nation, follows Arizona’s no-DST rule. Business Date to Date (exclude holidays).
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