GMT to MST Converter

Convert Greenwich Mean Time (GMT) to Mountain Time (MST), with daylight saving time handled for you.

MST to GMT

Now in GMT

6:02 PM

Greenwich Mean Time · UTC / GMT

Now in MST

12:02 PM

Mountain Time · Denver

Results

6:02 PM GMT in MST

12:02 PM

Mountain Time · right now MST is 6 hours behind GMT

Times follow UTC / GMT for GMT and Denver for MST, using the IANA time zone database.

GMT to MST time difference

MST is 6 hours behind GMT for most of 2026, and 7 hours behind GMT for about 127 days, because daylight saving time changes on different dates.

Greenwich Mean Time does not use daylight saving time. In 2026, Mountain Time switches to MDT on March 8 and back to MST on November 1.

GMT to MST conversion table

Every hour on 2026-09-28. Highlighted rows fall inside 9 AM–5 PM in both zones.

GMT (Greenwich Mean Time)MST (Mountain Time)
12:00 AM6:00 PM · previous day
1:00 AM7:00 PM · previous day
2:00 AM8:00 PM · previous day
3:00 AM9:00 PM · previous day
4:00 AM10:00 PM · previous day
5:00 AM11:00 PM · previous day
6:00 AM12:00 AM
7:00 AM1:00 AM
8:00 AM2:00 AM
9:00 AM3:00 AM
10:00 AM4:00 AM
11:00 AM5:00 AM
12:00 PM6:00 AM
1:00 PM7:00 AM
2:00 PM8:00 AM
3:00 PM9:00 AM
4:00 PM10:00 AM
5:00 PM11:00 AM
6:00 PM12:00 PM
7:00 PM1:00 PM
8:00 PM2:00 PM
9:00 PM3:00 PM
10:00 PM4:00 PM
11:00 PM5:00 PM

Working hours overlap

On 2026-09-28, a 9 AM–5 PM workday in GMT and in MST overlap for about 2 hours, from 3:00 PM to 5:00 PM GMT (9:00 AM to 11:00 AM MST).

Convert GMT to other time zones

How to use

Follow these steps to get a result

  1. Pick a date and a time in Greenwich Mean Time (GMT).

  2. Read the matching MST time, including whether it falls on the next or previous day.

  3. Scan the 24-hour table to see every hour at once, with shared working hours highlighted.

Features

What this tool includes

  • Live clocks for both time zones

  • Daylight saving time handled automatically

  • 24-hour conversion table

  • Working-hours overlap

FAQ

Common questions about this tool

MST is 6 hours behind GMT for most of 2026, and 7 hours behind GMT for about 127 days, because daylight saving time changes on different dates.

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