Time Difference Between Mountain Time and Arizona Time
As of 31 August 2026, Arizona Time is 1 hour behind Mountain Time. That number is not constant. Over the course of a year, because of daylight saving changes, Arizona Time, United States ranges from 1 hour behind to level with it relative to Mountain Time, United States. The calculator below is always up to date.
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Mountain Time, United States
16:34
Mon, Aug 31, 2026
UTC-6 · MDT · America/Denver
Arizona Time, United States
-1h15:34
Mon, Aug 31, 2026
UTC-7 · MST · America/Phoenix
Arizona Time is 1 hour behind Mountain Time.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| Mountain Time | Monday, August 31, 2026 | MDTAmerica/Denver | UTC-6 | Active now |
| Arizona Time | Monday, August 31, 2026 | MSTAmerica/Phoenix | UTC-7 | Not observed |
Mountain Time: Covers Denver and most of the Rocky Mountain states. Switches between MST (UTC-7) and MDT (UTC-6) with daylight saving — unlike Arizona, which stays on MST year-round.
Arizona Time: Most of Arizona does not observe daylight saving time, so it stays at UTC-7 all year — the same clock as Mountain Standard Time in winter, but 1 hour behind Mountain Time in summer. The Navajo Nation in Arizona is the exception and does observe it.
Hour by hour: Mountain Time to Arizona Time
Every hour of today in Mountain Time and what it is in Arizona Time. Highlighted rows fall inside Arizona Time working hours (09:00–18:00).
| Mountain Time | Arizona Time |
|---|---|
| 00:00 | 23:00prev day |
| 01:00 | 00:00 |
| 02:00 | 01:00 |
| 03:00 | 02:00 |
| 04:00 | 03:00 |
| 05:00 | 04:00 |
| 06:00 | 05:00 |
| 07:00 | 06:00 |
| 08:00 | 07:00 |
| 09:00 | 08:00 |
| 10:00 | 09:00 |
| 11:00 | 10:00 |
| Mountain Time | Arizona Time |
|---|---|
| 12:00 | 11:00 |
| 13:00 | 12:00 |
| 14:00 | 13:00 |
| 15:00 | 14:00 |
| 16:00 | 15:00 |
| 17:00 | 16:00 |
| 18:00 | 17:00 |
| 19:00 | 18:00 |
| 20:00 | 19:00 |
| 21:00 | 20:00 |
| 22:00 | 21:00 |
| 23:00 | 22:00 |
Best time to call or meet
Overlapping working hours
10:00–18:00 in Mountain Time (09:00–17:00 in Arizona Time)
Both places are inside 09:00–18:00 for 8 hours a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
09:00–21:00 in Mountain Time (08:00–20:00 in Arizona Time)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
Mountain Time puts its clocks back on Sunday, November 1, 2026
The local offset moves from UTC-6 to UTC-7. After that date, Arizona Time is on the same time as Mountain Time — instead of 1 hour behind, as it is today.
Planning something with more than two places?
Adding a third city usually kills the obvious answer. The Meeting Time Finder takes up to five cities at once and shows only the hours that work for everybody.
Mountain Time and Arizona Time: common questions
What is the time difference between Mountain Time and Arizona Time?
As of 31 August 2026, Arizona Time is 1 hour behind Mountain Time. The gap is not fixed: across the year, Arizona Time ranges from 1 hour behind to level with it relative to Mountain Time, as clocks change. The calculator on this page always shows the difference for right now.
When it is 9:00 AM in Mountain Time, what time is it in Arizona Time?
It is 08:00 AM in Arizona Time, United States. Use the time field in the calculator above to check any other hour.
Is Arizona Time ahead of or behind Mountain Time?
Arizona Time is behind Mountain Time by 1 hour at the moment. In practical terms, the working day in Arizona Time starts and ends later in Mountain Time terms.
Do Mountain Time and Arizona Time observe daylight saving time?
Mountain Time changes its clocks twice a year; Arizona Time does not. The difference therefore shifts by an hour when Mountain Time switches: across the year, Arizona Time ranges from 1 hour behind to level with it relative to Mountain Time.
What is the best time to call Arizona Time from Mountain Time?
Working hours overlap between 10:00 and 18:00 Mountain Time time, which is 09:00 to 17:00 in Arizona Time. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for Mountain Time, United States (UTC-6) and Arizona Time, United States (UTC-7) were generated on Monday, August 31, 2026 UTC and refresh in your browser.