2024 time change dates for Arizona
Arizona does not observe Daylight Saving Time
Arizona has opted out of Daylight Saving Time since 1968 and stays on Mountain Standard Time. The Navajo Nation, in the north-east corner of the state, is the exception and does change its clocks.
Arizona stays on MST for the whole year.
Countdown to the next change
Background
- The energy case for DST is weak by modern standards. A US Department of Energy study in 2008 found savings of about 0.5% of daily electricity use, and other studies have found no saving at all.
- Arizona and Hawaii are the only US states that skip DST statewide, along with the territories of Puerto Rico, Guam, American Samoa and the US Virgin Islands.
- The Uniform Time Act of 1966 ended a chaotic period in which US cities set their own clock-change dates, and established a uniform national schedule.
Tips for Arizona
Take advantage of the 'extra' hour in fall to catch up on sleep or tackle a project.
Gradually adjust your sleep schedule a few days before the time change to minimize disruption.
Use the extra evening daylight in summer for outdoor activities and vitamin D.
Set your clocks before going to bed to avoid confusion in the morning.
Frequently asked questions
When do the clocks change in Arizona in 2024?
They do not. Arizona does not observe Daylight Saving Time.
Which way do the clocks go?
"Spring forward, fall back" is the usual mnemonic: forward one hour in spring, back one hour in autumn.
Do I have to change anything myself?
Phones, computers and anything that syncs over the internet update on their own. Car clocks, ovens, microwaves and older wall clocks generally do not.
Is Daylight Saving Time being scrapped?
It has been proposed in many places and adopted in few. The European Parliament voted in 2019 to end mandatory clock changes and the change has stalled; in the United States the Sunshine Protection Act has repeatedly passed the Senate without becoming law. Most of the world that changes its clocks is still changing them.