Greenwich Mean Time to US Mountain Time
Convert times between Greenwich Mean Time (GMT, UTC+0:00) and US Mountain Time (MST, UTC-7:00). US Mountain Time is 7 hours behind Greenwich Mean Time in standard time.
UTC+0:00 / +1:00→UTC-7:00 / -6:00
Live timezone converterUTC Offset Reference
| Timezone | Abbreviation | Standard offset | DST offset | Country |
|---|---|---|---|---|
| Greenwich Mean Time | GMT / BST | UTC+0:00 | UTC+1:00 | United Kingdom |
| US Mountain Time | MST / MDT | UTC-7:00 | UTC-6:00 | United States |
* DST offset applies during summer months. Exact transition dates vary by year.
Standard Time Conversion (GMT → MST)
| Greenwich Mean Time | US Mountain Time |
|---|---|
| 12:00 AM GMT | 5:00 PM (prev day) MST |
| 6:00 AM GMT | 11:00 PM (prev day) MST |
| 9:00 AM GMT | 2:00 AM MST |
| 12:00 PM GMT | 5:00 AM MST |
| 3:00 PM GMT | 8:00 AM MST |
| 6:00 PM GMT | 11:00 AM MST |
| 9:00 PM GMT | 2:00 PM MST |
Daylight Saving Time (DST) Notes
- Greenwich Mean Time observes DST. Clocks advance 1 hour to BST (UTC+1:00) roughly from month 3 to 10.
- US Mountain Time observes DST. Clocks advance 1 hour to MDT (UTC-6:00) roughly from month 3 to 11.
Frequently Asked Questions
How do I convert GMT to MST?
Add (-7) hours to the GMT time to get MST. For example, 9:00 AM GMT = 2:00 AM MST.
What is the current UTC offset for Greenwich Mean Time?
Greenwich Mean Time is UTC+0:00 during standard time (GMT) and UTC+1:00 during summer daylight saving time (BST).
Is US Mountain Time ahead or behind Greenwich Mean Time?
US Mountain Time is 7 hours behind Greenwich Mean Time in standard time.
When is a good time to schedule a meeting between GMT and MST?
Due to the 7-hour difference, business-hours overlap may be limited. Use the live timezone converter to find a mutually convenient time.
Related Timezone Conversions
Greenwich Mean Time → US Eastern TimeGMT / ESTGreenwich Mean Time → US Central TimeGMT / CSTGreenwich Mean Time → US Pacific TimeGMT / PSTGreenwich Mean Time → US Alaska TimeGMT / AKSTGreenwich Mean Time → Hawaii TimeGMT / HSTGreenwich Mean Time → Canada Atlantic TimeGMT / ASTGreenwich Mean Time → Central European TimeGMT / CETGreenwich Mean Time → Eastern European TimeGMT / EET
Need the exact current time?
Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.