Portsmouth Time to MST Converter
MST is 7 hours behind GMT. 9:00 AM GMT = 2:00 AM MST.
MST is 7 hours behind GMT at the moment. To convert Portsmouth Time to MST, subtract 7 hours from the Portsmouth Time time: 9:00 AM GMT = 2:00 AM MST.
Portsmouth Time (Portsmouth time) is used in Portsmouth, UK. MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year.
Most of Arizona uses MST all year and does not switch to MDT.
Portsmouth Time to MST time conversion table
Portsmouth Time to MST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| Portsmouth Time | MST |
|---|---|
| 12:00 AM | 5:00 PM−1 |
| 1:00 AM | 6:00 PM−1 |
| 2:00 AM | 7:00 PM−1 |
| 3:00 AM | 8:00 PM−1 |
| 4:00 AM | 9:00 PM−1 |
| 5:00 AM | 10:00 PM−1 |
| 6:00 AM | 11:00 PM−1 |
| 7:00 AM | 12:00 AM |
| Portsmouth Time | MST |
|---|---|
| 8:00 AM | 1:00 AM |
| 9:00 AM | 2:00 AM |
| 10:00 AM | 3:00 AM |
| 11:00 AM | 4:00 AM |
| 12:00 PM | 5:00 AM |
| 1:00 PM | 6:00 AM |
| 2:00 PM | 7:00 AM |
| 3:00 PM | 8:00 AM |
| Portsmouth Time | MST |
|---|---|
| 4:00 PM | 9:00 AM |
| 5:00 PM | 10:00 AM |
| 6:00 PM | 11:00 AM |
| 7:00 PM | 12:00 PM |
| 8:00 PM | 1:00 PM |
| 9:00 PM | 2:00 PM |
| 10:00 PM | 3:00 PM |
| 11:00 PM | 4:00 PM |
Conversion table from Portsmouth Time to MST for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in MST, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert Portsmouth Time to MST
Subtract 7 hours from the Portsmouth Time time to get MST.
Example: 9:00 AM GMT = 2:00 AM MST.
Across midnight: 1:00 AM GMT = 6:00 PM MST (previous day). The date changes, so always check the day as well as the hour.
Time difference between Portsmouth Time and MST
The time difference between Portsmouth Time and MST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 1 Jan 2026 – 7 Mar 2026: MST is 7 hours behind of Portsmouth Time.
- 8 Mar 2026 – 28 Mar 2026: MST is 6 hours behind of Portsmouth Time.
- 29 Mar 2026 – 24 Oct 2026: MST is 7 hours behind of Portsmouth Time.
- 25 Oct 2026 – 31 Oct 2026: MST is 6 hours behind of Portsmouth Time.
- 1 Nov 2026 – 31 Dec 2026: MST is 7 hours behind of Portsmouth Time.
Portsmouth Time and MST during daylight saving time
- Portsmouth Time next changes on 28 Mar 2027: clocks go forward one hour at 00:59 local time, from GMT (UTC+0) to BST (UTC+1).
- MST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from MST (UTC−7) to MDT (UTC−6).
Best time for a meeting between Portsmouth Time and MST
Portsmouth Time and MST share 1 hour of the 9 AM–5 PM working day. Any time between 4:00 PM and 5:00 PM GMT lands between 9:00 AM and 10:00 AM MST, inside working hours for both.
Portsmouth Time to MST FAQ
What is the time difference between Portsmouth Time and MST?
Right now MST is 7 hours behind GMT. The gap changes 5 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM Portsmouth Time in MST?
9:00 AM GMT is 2:00 AM MST.
What is 12 PM (noon) Portsmouth Time in MST?
12:00 PM GMT is 5:00 AM MST.
Is MST ahead of or behind Portsmouth Time?
MST is 7 hours behind GMT, so it is earlier in MST than in Portsmouth Time.
Does Portsmouth Time change for daylight saving time?
Yes. Portsmouth Time next changes on 28 Mar 2027, when clocks go forward one hour from GMT to BST.
Does MST change for daylight saving time?
Yes. MST next changes on 14 Mar 2027, when clocks go forward one hour from MST to MDT.
What is the best time for a meeting between Portsmouth Time and MST?
Portsmouth Time and MST share 1 hour of the 9 AM–5 PM working day. Any time between 4:00 PM and 5:00 PM GMT lands between 9:00 AM and 10:00 AM MST, inside working hours for both.
Is MT the same as MST?
MST is the winter (standard) name of Mountain Time (MT). From March to November the same clocks are called MDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert MST to Portsmouth Time
Convert Portsmouth Time to other time zones
Convert other time zones to MST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.