2025 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
- 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.
- Russia experimented with permanent summer time from 2011 to 2014 before settling on permanent standard time.
- 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.
Tips for Arizona
Use the extra evening daylight in summer for outdoor activities and vitamin D.
Be extra cautious driving the Monday after the spring time change - accident rates increase.
Take advantage of the 'extra' hour in fall to catch up on sleep or tackle a project.
Update your car clock, microwave, and other manual clocks that don't auto-update.
Frequently asked questions
When do the clocks change in Arizona in 2025?
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.