Which statement about Arizona's time zone is correct?

Which statement about Arizona's time zone is correct?

• A. Mountain Time Zone; observes daylight saving time year-round
• B. Mountain Time Zone; does not observe daylight saving time except in the Navajo Nation
• C. Central Time Zone; observes daylight saving time
• D. Pacific Time Zone; does not observe daylight saving time

Answer: (B)

Arizona sits in the Mountain Time Zone, but it does not observe daylight saving time for most of the state. That means the vast majority of Arizona stays on Mountain Standard Time year-round (UTC−7). The Navajo Nation, which covers parts of northeastern Arizona, does observe daylight saving time, so those areas shift to Mountain Daylight Time (UTC−6) in the summer and back in the fall. This combination—MST year-round for most of the state, with DST observed inside the Navajo Nation—is why the best choice describes Arizona as in the Mountain Time Zone and notes the exception of DST for the Navajo Nation. The other statements are off because they either place Arizona in a different time zone or claim year-round DST, which isn’t the case.

Arizona sits in the Mountain Time Zone, but it does not observe daylight saving time for most of the state. That means the vast majority of Arizona stays on Mountain Standard Time year-round (UTC−7). The Navajo Nation, which covers parts of northeastern Arizona, does observe daylight saving time, so those areas shift to Mountain Daylight Time (UTC−6) in the summer and back in the fall. This combination—MST year-round for most of the state, with DST observed inside the Navajo Nation—is why the best choice describes Arizona as in the Mountain Time Zone and notes the exception of DST for the Navajo Nation. The other statements are off because they either place Arizona in a different time zone or claim year-round DST, which isn’t the case.