What time zone is arizona in?

Arizona is primarily in the Mountain Time Zone. Here are the key details:

• Most of Arizona observes Mountain Standard Time (MST) year-round and does not follow Daylight Saving Time (DST)235.
• However, the Navajo Nation, which is located in northeastern Arizona, does observe Daylight Saving Time. During DST, the Navajo Nation follows Mountain Daylight Time (MDT)123.

This arrangement means that, except for the Navajo Nation, Arizona remains on MST throughout the year.