Time Difference Between Eastern Time and Mountain Time
As of 31 August 2026, Mountain Time is 2 hours behind Eastern Time. This difference is fixed: neither zone shifts its clocks against the other, so it holds all year.
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Eastern Time, 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 Eastern Time.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| Eastern Time | Monday, August 31, 2026 | EDTAmerica/New_York | UTC-4 | Active now |
| Mountain Time | Monday, August 31, 2026 | MDTAmerica/Denver | UTC-6 | Active now |
Eastern Time: Covers the US East Coast, from New York to Miami to Atlanta. Switches between EST (UTC-5) and EDT (UTC-4) with daylight saving.
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: Eastern Time to Mountain Time
Every hour of today in Eastern Time and what it is in Mountain Time. Highlighted rows fall inside Mountain Time working hours (09:00–18:00).
| Eastern Time | 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 |
| Eastern Time | 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 Eastern Time (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 Eastern Time (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
Eastern Time 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 Eastern Time — 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 Eastern Time 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.
Eastern Time and Mountain Time: common questions
What is the time difference between Eastern Time and Mountain Time?
Mountain Time is 2 hours behind Eastern Time, and this does not change during the year because the difference between these two zones is fixed.
When it is 9:00 AM in Eastern Time, 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 Eastern Time?
Mountain Time is behind Eastern Time by 2 hours at the moment. In practical terms, the working day in Mountain Time starts and ends later in Eastern Time terms.
Do Eastern Time and Mountain Time observe daylight saving time?
Both Eastern Time 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 Eastern Time.
What is the best time to call Mountain Time from Eastern Time?
Working hours overlap between 11:00 and 18:00 Eastern Time 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 Eastern Time, United States (UTC-4) and Mountain Time, United States (UTC-6) were generated on Monday, August 31, 2026 UTC and refresh in your browser.