Time Difference Between London and Mountain Time
As of 31 August 2026, Mountain Time is 7 hours behind London. That number is not constant. Over the course of a year, because of daylight saving changes, Mountain Time, United States ranges from 7 hours behind to 6 hours behind relative to London, United Kingdom. The calculator below is always up to date.
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London, United Kingdom
23:34
Mon, Aug 31, 2026
UTC+1 · Europe/London
Mountain Time, United States
-7h16:34
Mon, Aug 31, 2026
UTC-6 · MDT · America/Denver
Mountain Time is 7 hours behind London.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| London | Monday, August 31, 2026 | Europe/London | UTC+1 | Active now |
| Mountain Time | Monday, August 31, 2026 | MDTAmerica/Denver | UTC-6 | Active now |
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: London to Mountain Time
Every hour of today in London and what it is in Mountain Time. Highlighted rows fall inside Mountain Time working hours (09:00–18:00).
| London | Mountain Time |
|---|---|
| 00:00 | 17:00prev day |
| 01:00 | 18:00prev day |
| 02:00 | 19:00prev day |
| 03:00 | 20:00prev day |
| 04:00 | 21:00prev day |
| 05:00 | 22:00prev day |
| 06:00 | 23:00prev day |
| 07:00 | 00:00 |
| 08:00 | 01:00 |
| 09:00 | 02:00 |
| 10:00 | 03:00 |
| 11:00 | 04:00 |
| London | Mountain Time |
|---|---|
| 12:00 | 05:00 |
| 13:00 | 06:00 |
| 14:00 | 07:00 |
| 15:00 | 08:00 |
| 16:00 | 09:00 |
| 17:00 | 10:00 |
| 18:00 | 11:00 |
| 19:00 | 12:00 |
| 20:00 | 13:00 |
| 21:00 | 14:00 |
| 22:00 | 15:00 |
| 23:00 | 16:00 |
Best time to call or meet
Overlapping working hours
16:00–18:00 in London (09:00–11:00 in Mountain Time)
Both places are inside 09:00–18:00 for 2 hours a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
15:00–21:00 in London (08:00–14:00 in Mountain Time)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
London puts its clocks back on Sunday, October 25, 2026
The local offset moves from UTC+1 to UTC. After that date, Mountain Time is 6 hours behind London — instead of 7 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 London and Mountain Time stays at 7 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.
London and Mountain Time: common questions
What is the time difference between London and Mountain Time?
As of 31 August 2026, Mountain Time is 7 hours behind London. The gap is not fixed: across the year, Mountain Time ranges from 7 hours behind to 6 hours behind relative to London, as clocks change. The calculator on this page always shows the difference for right now.
When it is 9:00 AM in London, what time is it in Mountain Time?
It is 02:00 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 London?
Mountain Time is behind London by 7 hours at the moment. In practical terms, the working day in Mountain Time starts and ends later in London terms.
Do London and Mountain Time observe daylight saving time?
Both London 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 7 hours behind to 6 hours behind relative to London.
What is the best time to call Mountain Time from London?
Working hours overlap between 16:00 and 18:00 London time, which is 09:00 to 11:00 in Mountain Time. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for London, United Kingdom (UTC+1) and Mountain Time, United States (UTC-6) were generated on Monday, August 31, 2026 UTC and refresh in your browser.