Time in Arizona, the state that never changes its clocks.

Most of Arizona is on Mountain Standard Time, MST, which is UTC-7, and it stays on MST all year. The state does not move its clocks for daylight saving time, so Arizona matches Pacific time in summer and Mountain time in winter. The one exception is the Navajo Nation, which does observe daylight saving time. The big clock above shows Phoenix time to the second, and the cards show your gap to Arizona right now.

How to use this Arizona time page

1. Read the big clock: hours, minutes and seconds in Arizona, then the date, the name of the zone and its UTC offset.
2. The cards under it show the time zone, the UTC offset, whether the place changes its clocks and when next, and the difference from your own time zone. If the page has guessed your zone wrong, pick the right one under Your place.
3. To plan a call, set a Date and a Time under What time is it there when it is. The line under the boxes gives the time in Arizona, with the day. Use now sets your own current time.
4. The row of eight times below shows common hours of your day, every three hours, next to the matching time there.
5. On the right, tick 24-hour clock or switch Show seconds off. Copy the time copies one line you can paste into a message. Your choices stay in this browser.

The small clock under the big one shows the Navajo Nation, so you can see both Arizona clocks at once.

What the official sources say

The US Department of Transportation says daylight saving time is not observed in Hawaii, American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, the Virgin Islands and most of Arizona. It also says a state may exempt itself from daylight saving time by state law. In 49 CFR Part 71, the boundary between the Mountain and Pacific zones runs along the Nevada-Arizona and Arizona-California borders, which puts Arizona in the Mountain zone. A note in the IANA time zone database says the Navajo Nation takes part in daylight saving time and points to its America/Denver zone for it. The page uses America/Phoenix for most of the state. Checked 18 Oct 2026.

Arizona next to its neighbours

Arizona stays at UTC-7. Its neighbours move, so the gap changes in March and again in November. The table shows how far Arizona is ahead of or behind each place in the middle of January and July 2026.

Two rules cover most cases. In winter, Phoenix is on the same time as Denver and one hour ahead of Los Angeles. In summer, Denver moves one hour ahead of Phoenix and Los Angeles is on the same time as Phoenix. The easiest way to remember it is that Arizona does not move, so everyone else moves around it.

The Navajo Nation

The Navajo Nation covers part of northeast Arizona and observes daylight saving time, so its clocks follow Denver. At noon in Phoenix on 15 January 2026 the Navajo Nation clock reads 12:00 PM MST on 15 Jan, and on 15 July 2026 it reads 1:00 PM MDT on 15 Jul. That means that in summer, a short drive across the line can add an hour. If you are travelling to the northeast of the state in summer, check which clock a business keeps before you set a time.

A worked example

Say you want to call Phoenix at 10:00 AM in Chicago on 14 July 2026. Chicago is on CDT, which is UTC-5, so 10:00 AM is 3:00 PM UTC. Phoenix is on MST, which is UTC-7, so subtract 7 hours: it is 8:00 AM in Phoenix. In January, Chicago is on CST at UTC-6, so 10:00 AM is 4:00 PM UTC, which is 9:00 AM in Phoenix. The call time you pick in Chicago is the same, but the Phoenix time moves by an hour. Use the box above to check any date.

Why some phones disagree

If a device is set to the Denver zone, it will show an hour later than Phoenix from March to November. Check the zone on your device if the page and your phone differ. The page uses your device's zone for the Difference from you card and for the starting boxes.

Sources, checked 18 Oct 2026. US Department of Transportation, Daylight Saving Time; 49 CFR Part 71; the IANA time zone database (version 2026e), northamerica file.

See also time in Las Vegas and time in Hawaii, and EST to PST.