Time Difference Between United States and Mountain Time
As of 31 August 2026, Mountain Time is 2 hours behind United States. This difference is fixed: neither zone shifts its clocks against the other, so it holds all year.
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New York, United States
18:34
Mon, Aug 31, 2026
UTC-4 · EDT · America/New_York
Mountain Time, United States
-2h16:34
Mon, Aug 31, 2026
UTC-6 · MDT · America/Denver
Mountain Time is 2 hours behind United States.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| United States | Monday, August 31, 2026 | EDTAmerica/New_York | UTC-4 | Active now |
| Mountain Time | Monday, August 31, 2026 | MDTAmerica/Denver | UTC-6 | Active now |
United States: The United States spans six main time zones. This page uses Eastern Time; Pacific Time is 3 hours behind it.
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.
Hour by hour: United States to Mountain Time
Every hour of today in United States and what it is in Mountain Time. Highlighted rows fall inside Mountain Time working hours (09:00–18:00).
| United States | Mountain Time |
|---|---|
| 00:00 | 22:00prev day |
| 01:00 | 23:00prev day |
| 02:00 | 00:00 |
| 03:00 | 01:00 |
| 04:00 | 02:00 |
| 05:00 | 03:00 |
| 06:00 | 04:00 |
| 07:00 | 05:00 |
| 08:00 | 06:00 |
| 09:00 | 07:00 |
| 10:00 | 08:00 |
| 11:00 | 09:00 |
| United States | Mountain Time |
|---|---|
| 12:00 | 10:00 |
| 13:00 | 11:00 |
| 14:00 | 12:00 |
| 15:00 | 13:00 |
| 16:00 | 14:00 |
| 17:00 | 15:00 |
| 18:00 | 16:00 |
| 19:00 | 17:00 |
| 20:00 | 18:00 |
| 21:00 | 19:00 |
| 22:00 | 20:00 |
| 23:00 | 21:00 |
Best time to call or meet
Overlapping working hours
11:00–18:00 in United States (09:00–16:00 in Mountain Time)
Both places are inside 09:00–18:00 for 7 hours a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
10:00–21:00 in United States (08:00–19:00 in Mountain Time)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
United States puts its clocks back on Sunday, November 1, 2026
The local offset moves from UTC-4 to UTC-5. After that date, Mountain Time is 1 hour behind United States — instead of 2 hours behind, as it is today.
Mountain Time puts its clocks back on Sunday, November 1, 2026
The local offset moves from UTC-6 to UTC-7. The gap between United States and Mountain Time stays at 2 hours because both places change at the same time.
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.
United States and Mountain Time: common questions
What is the time difference between United States and Mountain Time?
Mountain Time is 2 hours behind United States, and this does not change during the year because the difference between these two zones is fixed.
When it is 9:00 AM in United States, what time is it in Mountain Time?
It is 07:00 AM in Mountain Time, United States. Use the time field in the calculator above to check any other hour.
Is Mountain Time ahead of or behind United States?
Mountain Time is behind United States by 2 hours at the moment. In practical terms, the working day in Mountain Time starts and ends later in United States terms.
Do United States and Mountain Time observe daylight saving time?
Both United States and Mountain Time change their clocks, but not on the same dates. That is why the gap is not fixed: across the year, Mountain Time ranges from 2 hours behind to 2 hours behind relative to United States.
What is the best time to call Mountain Time from United States?
Working hours overlap between 11:00 and 18:00 United States time, which is 09:00 to 16:00 in Mountain Time. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for New York, United States (UTC-4) and Mountain Time, United States (UTC-6) were generated on Monday, August 31, 2026 UTC and refresh in your browser.