GMT → MST Converter
London to Mountain — less common; primarily for UK energy companies with North American operations in Calgary or Denver.
GMT → MST
7:40 PM
British Summer Time (GMT+1)
Thursday, June 11, 2026
UTC+1 (DST active)
12:40 PM
Mountain Daylight Time (MDT)
Thursday, June 11, 2026
UTC-6 (DST active)
Time Zone Converter
GMT·London
7:40 PM
Thursday, June 11, 2026
MST·Denver
12:40 PM
Thursday, June 11, 2026
Compare Times
| GMT | MST |
|---|
Morning
| GMT | MST |
|---|---|
| 12:00 AM GMT | 5:00 PM MST |
| 1:00 AM GMT | 6:00 PM MST |
| 2:00 AM GMT | 7:00 PM MST |
| 3:00 AM GMT | 8:00 PM MST |
| 4:00 AM GMT | 9:00 PM MST |
| 5:00 AM GMT | 10:00 PM MST |
| 6:00 AM GMT | 11:00 PM MST |
| 7:00 AM GMT | 12:00 AM MST |
| 8:00 AM GMT | 1:00 AM MST |
| 9:00 AM GMT | 2:00 AM MST |
| 10:00 AM GMT | 3:00 AM MST |
| 11:00 AM GMT | 4:00 AM MST |
Afternoon
| GMT | MST |
|---|---|
| 12:00 PM GMT | 5:00 AM MST |
| 1:00 PM GMT | 6:00 AM MST |
| 2:00 PM GMT | 7:00 AM MST |
| 3:00 PM GMT | 8:00 AM MST |
| 4:00 PM GMT | 9:00 AM MST |
Evening
| GMT | MST |
|---|---|
| 5:00 PM GMT | 10:00 AM MST |
| 6:00 PM GMT | 11:00 AM MST |
| 7:00 PM GMT | 12:00 PM MST |
| 8:00 PM GMT | 1:00 PM MST |
| 9:00 PM GMT | 2:00 PM MST |
| 10:00 PM GMT | 3:00 PM MST |
| 11:00 PM GMT | 4:00 PM MST |
Frequently Asked Questions: GMT to MST
What is the time difference between UK Time and Mountain Time?
MST is 7 hours behind GMT (standard time).
What time is midnight in GMT in MST?
Midnight (12:00 AM) in UK Time translates to 5:00 PM MST in Mountain Time.
When do business hours overlap between GMT and MST?
The business hours overlap window is 16:00–17:00 GMT (09:00–10:00 MST). The shared window is limited; aim for the earlier part of this range when possible.
Common Time Conversions
EST · New York →
CST · Chicago →
MST · Denver →
PST · Los Angeles →
AKST · Anchorage →
HST · Honolulu →
UTC · Universal →
GMT · London →
IST · New Delhi →
CET · Paris →
How Time Zone Conversion Works
Time zone conversion works by comparing the UTC offset of one location to another. Every city or region is measured relative to Coordinated Universal Time (UTC), which acts as the global reference point for civil time.
MST is 7 hours behind GMT (standard time).
Daylight Saving Time: Both GMT and MST observe DST, but switch on different dates. For a few weeks each spring and autumn, the gap shifts by 1 hour — a common source of missed meetings and calendar tool errors.
Best time to call Denver from London
Planning a remote meeting or international call? The optimal business hours overlap between London and Denver is moderate, with a limited shared window to work with.
Try Meeting Planner for multi-city group scheduling →GMT
16:00–17:00
Greenwich Time
MST
09:00–10:00
Mountain Time
Recommended time: 16:30 GMT / 09:30 MST
DST schedule for 2026
Current-year daylight saving start and end dates for the selected zones.
GMT · Greenwich Time
Standard offset +00:00
- Starts
- Mar 29, 2026 · 01:00 → 02:00
- last_sunday_of_march
- Ends
- Oct 25, 2026 · 02:00 → 01:00
- last_sunday_of_october
- Daylight time
- BST · +01:00
GMT countries vary. The UK, Ireland, and Portugal observe summer time; Iceland and most of West Africa remain on GMT year-round.
MST · Mountain Time
Standard offset −07:00
- Starts
- Mar 8, 2026 · 02:00 → 03:00
- second_sunday_of_march
- Ends
- Nov 1, 2026 · 02:00 → 01:00
- first_sunday_of_november
- Daylight time
- MDT · −06:00
Most of Arizona stays on MST year-round (does not observe DST). The Navajo Nation within Arizona does observe DST.
Principal Cities
GMT — Greenwich Time
- LondonUnited Kingdom
- DublinIreland
- LisbonPortugal
- CasablancaMorocco
MST — Mountain Time
- PhoenixUnited States
- CalgaryCanada
- EdmontonCanada
- DenverUnited States
Flight Information
Route
LHR ↔ DEN
Avg. flight time
9h
Direct flights
Available
~9h direct flight.