Arizona does not observe daylight savings time. As a result, while most of the United States set their clocks ahead one hour on April 1, Arizona (and NAPM Headquarters) remained on Mountain Standard Time, as it does year-round. From April to October, Arizona is concurrent with Pacific Daylight Time. NAPM office hours are 7:30 a.m. to 4:30 p.m. MST, Monday through Thursday, and 7:30 a.m. to 3:30 p.m. MST, Friday. Those in the Midwestern and Eastern United States are now two and three hours ahead of Arizona.
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