Arizona is in the mountain time zone, but Nevada, next door, is in the Pacific time zone. Arizona doesn't use daylight saving time, though, and as a result, from spring through fall Nevada and Arizona observe the same hours. The Navajo Nation does observe daylight saving time, however, so it's always the same time on Navajo territory as in mountain time zone areas outside Arizona. Timeanddate.com can help you figure out the correct time anywhere.
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