Mountain Time

Phoenix time now, live flip clock

Synchronizing time

Synchronizing with server time.

Phoenix, Tucson and most of Arizona keep Mountain Standard Time, MST, UTC-7. The clocks do not change in spring or autumn, except on the Navajo Nation. The clock above shows Arizona time now, live, with seconds.

Updated · Time zone data 2026e · Sources

Time in Phoenix at a glance

Time zone
Mountain Time (MST)
Standard time
MST, UTC-7
Daylight saving time
Not observed
Used in
the United States, Canada
Time zone names for developers

IANA time zone identifier: America/Phoenix

Places on Arizona time

One US state keeps this clock. Arizona stays on standard time all year, except on the Navajo Nation. The time zone database also files Creston, a town in British Columbia, under Phoenix.

PlaceWhereClock changes
ArizonaAll of the state except the Navajo NationPhoenix, TucsonStays on standard time

How many hours ahead or behind Phoenix

On 7 October 2026, Denver is 1 hour ahead of Phoenix.

CityDifference from Phoenix
Denver1 hour ahead
Los AngelesSame time
Chicago2 hours ahead
New York3 hours ahead
London8 hours ahead
Mexico City1 hour ahead
Tokyo16 hours ahead
Sydney18 hours ahead
Your time zoneDetected after this page loads

Convert a time between any two placesDaylight saving dates around the world

How Arizona keeps its clock

Same as Denver in winter, Los Angeles in summer
0 hfrom Denver in winter, from Los Angeles in summer
Denver is on the same time as Phoenix in winter. In summer Denver moves its clocks forward one hour and Arizona does not. So Denver runs an hour ahead of Phoenix until autumn. Los Angeles is 1 hour behind Phoenix in winter. In summer Los Angeles moves forward and matches Phoenix to the minute.
The Navajo Nation
MDTon the Navajo Nation in summer, with Utah and New Mexico
The Navajo Nation changes its clocks with Denver, not with the rest of Arizona. It does so to stay on the same time as its communities in Utah and New Mexico. So in summer it runs one hour ahead of Phoenix. In winter it matches the rest of Arizona.
Sources Navajo Nation Office of the President, Daylight saving time, NIST, Daylight saving time
Sonora shares the clock
MSTin Sonora, Mexico, every month of the year
Sonora, across the border in Mexico, keeps MST, UTC-7 with no clock changes. Hermosillo is on the same time as Phoenix all year.
The law behind it
1-242the Arizona statute that rejects daylight saving time
Federal law lets a state inside one time zone exempt itself from daylight saving time. Arizona did so by statute. Section 1-242 of the Arizona Revised Statutes rejects daylight saving time and keeps standard mountain time. Arizona observed daylight saving time again in the late sixties, and its legislature repealed it after one year. The statute says a future legislature may change the choice.
Sources Arizona State Legislature, Arizona Revised Statutes 1-242, standard time, Cornell LII, 15 U.S. Code 260a, daylight saving time, IANA time zone database, North America zones file

Questions about Mountain Time

What time is it in Arizona now?

The clock at the top of this page shows Arizona time now, to the second. Phoenix, Tucson, Mesa and Chandler all show the same time. Arizona keeps MST, UTC-7 through the whole year. The one exception is the Navajo Nation, which runs one hour ahead in summer.

Does Arizona change its clocks for daylight saving time?

No. Arizona rejected daylight saving time by statute and stays on standard time all year. The Navajo Nation is the exception. It changes its clocks to stay in step with its communities in Utah and New Mexico. Hawaii is the only other state that keeps standard time all year.

Is Arizona on the same time as California?

Only in summer. Los Angeles is 1 hour behind Phoenix in winter. California keeps Pacific time and Arizona keeps mountain time. In spring California moves its clocks forward one hour and Arizona does not. So the two states show the same time until autumn. Then California sets its clocks back and the gap returns.

What is the time difference between Arizona and New York?

New York is 2 hours ahead of Phoenix in winter. In summer the gap grows to three hours. New York moves its clocks forward and Arizona does not. Chicago is 1 hour ahead of Phoenix in winter and two hours ahead in summer. The table above gives the live figure for each city.

Why does Phoenix have its own entry beside Denver?

The time zone database gives one entry to each region whose clocks have agreed since the seventies began. Denver changes its clocks twice a year and Phoenix does not, so each has its own entry. The site's time zone by state page gives the zone for Arizona and every other state.