GMT to MST — Time Zone Converter
Greenwich Mean Time (GMT, UTC+0) covers the United Kingdom; Mountain Time (MST, UTC−7) covers the US Mountain states. In standard time, MST is 7 hours behind GMT. Mornings in the US Mountain states overlap with afternoons in the United Kingdom, which keeps both sides inside office hours. Use the live converter below — it applies today's IANA time zone data, including daylight saving time, and gives you a meeting schedule you can paste straight into email or Slack.
GMT to MST, hour by hour (today)
Frequently asked questions
What is the time difference between GMT and MST?+
Greenwich Mean Time (GMT) is UTC+0 and Mountain Time (MST) is UTC−7, so in standard time MST is 7 hours behind GMT. The gap shifts by an hour around daylight saving transitions, so always check a live converter near the change dates in spring and autumn.
Does GMT or MST observe daylight saving time?+
Greenwich Mean Time observes daylight saving time (GMT in winter, BST in summer). Mountain Time observes daylight saving time (MST in winter, MDT in summer).
What is the best time for a meeting between GMT and MST?+
Mornings in the US Mountain states overlap with afternoons in the United Kingdom, which keeps both sides inside office hours. The converter above highlights office hours in green for both zones, so you can slide to a time that works for everyone.
How do I share a GMT to MST meeting time by email?+
Pick a time in the converter, log it to the Smart Clipboard, and copy it as bullets, a formatted table, or a one-line question — with both GMT and MST times spelled out so nobody has to do the math.