GMT to MST Time Converter

Convert Greenwich Mean Time (GMT) to Mountain Standard Time (MST). Both time zones are shown live below; current offset between them is 7 hours behind.

London · Greenwich Mean Time
19:28:20
Tuesday, May 5, 2026
GMT+1 · UTC+01:00
Denver · Mountain Standard Time
12:28:20
Tuesday, May 5, 2026
MDT · UTC-06:00

Convert a specific time

From: GMT (London)
To: MST (Denver)
--:--

Daylight Saving status right now

GMT (Greenwich Mean Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00
MST (Mountain Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-06:00 → UTC-07:00

When can GMT and MST meet?

1 hour of overlap during standard 9am-5pm working hours.
Best meeting window: 16:00–16:00 GMT (09:00–09:00 MST).

Hour-by-hour GMT to MST conversion table

GMT time (London)MST time (Denver)Status
00:00 Tue17:00 MonOff-hours both sides
01:00 Tue18:00 MonOff-hours both sides
02:00 Tue19:00 MonOff-hours both sides
03:00 Tue20:00 MonOff-hours both sides
04:00 Tue21:00 MonOff-hours both sides
05:00 Tue22:00 MonOff-hours both sides
06:00 Tue23:00 MonOff-hours both sides
07:00 Tue00:00 TueOff-hours both sides
08:00 Tue01:00 TueOff-hours both sides
09:00 Tue02:00 TueGMT working
10:00 Tue03:00 TueGMT working
11:00 Tue04:00 TueGMT working
12:00 Tue05:00 TueGMT working
13:00 Tue06:00 TueGMT working
14:00 Tue07:00 TueGMT working
15:00 Tue08:00 TueGMT working
16:00 Tue09:00 TueBoth at work
17:00 Tue10:00 TueMST working
18:00 Tue11:00 TueMST working
19:00 Tue12:00 TueMST working
20:00 Tue13:00 TueMST working
21:00 Tue14:00 TueMST working
22:00 Tue15:00 TueMST working
23:00 Tue16:00 TueMST working

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Greenwich Mean Time (GMT)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham
Mountain Standard Time (MST)
IANA identifier
America/Denver
Current UTC offset
UTC-06:00
Current abbreviation
MDT
Major cities in this zone
DenverPhoenixSalt Lake CityAlbuquerque

Sun today in London and Denver

London
Sunrise
05:26
Sunset
20:30
Solar noon
12:58
Daylight
15h 3m
Denver
Sunrise
05:56
Sunset
19:58
Solar noon
12:57
Daylight
14h 1m

Related converters

MST to GMT (reverse)GMT to ESTGMT to PSTGMT to UTCGMT to CETGMT to ISTEST to MSTPST to MSTUTC to MSTCET to MSTIST to MST
Looking for local time? See time in London or time in Denver.

Frequently asked questions

What is the time difference between GMT and MST right now?+
MST (Mountain Standard Time) is currently 7 hours behind GMT (Greenwich Mean Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does GMT or MST observe daylight saving time?+
GMT: observes daylight saving time. MST: observes daylight saving time.
When is the best time to schedule a meeting between GMT and MST?+
The strongest overlap is 16:00–16:00 GMT (09:00–09:00 MST), giving 1 hour when both sides are within standard 9am-5pm working hours.
What time is it in Denver when it is 12:00 noon in London?+
When it is 12:00 Tue in London (GMT), it is 05:00 Tue in Denver (MST).
Which IANA time zone identifiers are used for GMT and MST?+
GMT maps to "Europe/London" in the IANA database. MST maps to "America/Denver". These identifiers are what most software libraries use to convert times accurately, including DST handling.