TimeToZone

MST to Portsmouth Time Converter

GMT is 7 hours ahead of MST. 9:00 AM MST = 4:00 PM GMT.

⇄ Swap
MSTfrom
Mountain Standard Time
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Portsmouth
Portsmouth, UK
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GMT is 7 hours ahead of MST at the moment. To convert MST to Portsmouth Time, add 7 hours to the MST time: 9:00 AM MST = 4:00 PM GMT.

MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year. Portsmouth Time (Portsmouth time) is used in Portsmouth, UK.

Most of Arizona uses MST all year and does not switch to MDT.

MST to Portsmouth Time time conversion table

MST to Portsmouth Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.

12 AM – 7 AM MST
MSTPortsmouth Time
12:00 AM7:00 AM
1:00 AM8:00 AM
2:00 AM9:00 AM
3:00 AM10:00 AM
4:00 AM11:00 AM
5:00 AM12:00 PM
6:00 AM1:00 PM
7:00 AM2:00 PM
8 AM – 3 PM MST
MSTPortsmouth Time
8:00 AM3:00 PM
9:00 AM4:00 PM
10:00 AM5:00 PM
11:00 AM6:00 PM
12:00 PM7:00 PM
1:00 PM8:00 PM
2:00 PM9:00 PM
3:00 PM10:00 PM
4 PM – 11 PM MST
MSTPortsmouth Time
4:00 PM11:00 PM
5:00 PM12:00 AM+1
6:00 PM1:00 AM+1
7:00 PM2:00 AM+1
8:00 PM3:00 AM+1
9:00 PM4:00 AM+1
10:00 PM5:00 AM+1
11:00 PM6:00 AM+1

Conversion table from MST to Portsmouth Time 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 Portsmouth Time, −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 MST to Portsmouth Time

Add 7 hours to the MST time to get Portsmouth Time.

Example: 9:00 AM MST = 4:00 PM GMT.

Across midnight: 10:00 PM MST = 5:00 AM GMT (next day). The date changes, so always check the day as well as the hour.

Time difference between MST and Portsmouth Time

The time difference between MST and Portsmouth Time 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:

  • 31 Dec 2025 – 7 Mar 2026: Portsmouth Time is 7 hours ahead of MST.
  • 8 Mar 2026 – 27 Mar 2026: Portsmouth Time is 6 hours ahead of MST.
  • 28 Mar 2026 – 23 Oct 2026: Portsmouth Time is 7 hours ahead of MST.
  • 24 Oct 2026 – 31 Oct 2026: Portsmouth Time is 6 hours ahead of MST.
  • 1 Nov 2026 – 30 Dec 2026: Portsmouth Time is 7 hours ahead of MST.

MST and Portsmouth Time during daylight saving time

  • 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).
  • 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).

Best time for a meeting between MST and Portsmouth Time

MST and Portsmouth Time share 1 hour of the 9 AM–5 PM working day. Any time between 9:00 AM and 10:00 AM MST lands between 4:00 PM and 5:00 PM GMT, inside working hours for both.

Plan a meeting across more time zones.

MST to Portsmouth Time FAQ

What is the time difference between MST and Portsmouth Time?

Right now GMT is 7 hours ahead of MST. The gap changes 5 times in 2026 because the two sides switch to daylight saving time on different dates.

What is 9 AM MST in Portsmouth Time?

9:00 AM MST is 4:00 PM GMT.

What is 12 PM (noon) MST in Portsmouth Time?

12:00 PM MST is 7:00 PM GMT.

Is Portsmouth Time ahead of or behind MST?

GMT is 7 hours ahead of MST, so it is later in Portsmouth Time than in MST.

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.

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.

What is the best time for a meeting between MST and Portsmouth Time?

MST and Portsmouth Time share 1 hour of the 9 AM–5 PM working day. Any time between 9:00 AM and 10:00 AM MST lands between 4:00 PM and 5:00 PM GMT, 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 Portsmouth Time to MST

Portsmouth Time to MST

Convert MST to other time zones

MST to ESTMST to PSTMST to CSTMST to Abbotsford TimeMST to Abidjan TimeMST to Abu Dhabi TimeMST to Adelaide TimeMST to AESTMST to Sherbrooke TimeMST to South Africa TimeMST to Southampton TimeMST to Southend Time

Convert other time zones to Portsmouth Time

AEST to Portsmouth TimeCET to Portsmouth TimeCST to Portsmouth TimeEST to Portsmouth TimeGMT to Portsmouth TimeIST to Portsmouth TimeJST to Portsmouth TimePST to Portsmouth TimeSGT to Portsmouth TimeUTC to Portsmouth Time

Learn more

MST time zoneCurrent time in Portsmouth

Updated 7 November 2026. Time zone data: IANA tz database.