MST to San Diego Time Converter
PST is 1 hour behind MST. 9:00 AM MST = 8:00 AM PST.
PST is 1 hour behind MST. To convert MST to San Diego Time, subtract 1 hour from the MST time: 9:00 AM MST = 8:00 AM PST.
MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year. San Diego Time (San Diego time) is used in San Diego, USA.
Most of Arizona uses MST all year and does not switch to MDT.
MST to San Diego Time time conversion table
MST to San Diego Time on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| MST | San Diego Time | Day |
|---|---|---|
| 12:00 AM MST | 11:00 PM PST | previous day |
| 1:00 AM MST | 12:00 AM PST | night |
| 2:00 AM MST | 1:00 AM PST | night |
| 3:00 AM MST | 2:00 AM PST | night |
| 4:00 AM MST | 3:00 AM PST | night |
| 5:00 AM MST | 4:00 AM PST | night |
| 6:00 AM MST | 5:00 AM PST | night |
| 7:00 AM MST | 6:00 AM PST | — |
| 8:00 AM MST | 7:00 AM PST | — |
| 9:00 AM MST | 8:00 AM PST | — |
| 10:00 AM MST | 9:00 AM PST | work hours |
| 11:00 AM MST | 10:00 AM PST | work hours |
| 12:00 PM MST | 11:00 AM PST | work hours |
| 1:00 PM MST | 12:00 PM PST | work hours |
| 2:00 PM MST | 1:00 PM PST | work hours |
| 3:00 PM MST | 2:00 PM PST | work hours |
| 4:00 PM MST | 3:00 PM PST | work hours |
| 5:00 PM MST | 4:00 PM PST | — |
| 6:00 PM MST | 5:00 PM PST | — |
| 7:00 PM MST | 6:00 PM PST | — |
| 8:00 PM MST | 7:00 PM PST | — |
| 9:00 PM MST | 8:00 PM PST | — |
| 10:00 PM MST | 9:00 PM PST | — |
| 11:00 PM MST | 10:00 PM PST | night |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert MST to San Diego Time
Subtract 1 hour from the MST time to get San Diego Time.
Example: 9:00 AM MST = 8:00 AM PST.
Across midnight: 12:00 AM MST = 11:00 PM PST (previous day). The date changes, so always check the day as well as the hour.
Time difference between MST and San Diego Time
The time difference between MST and San Diego Time is 1 hour all year – PST is behind MST.
MST and San Diego 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).
- San Diego Time next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from PST (UTC−8) to PDT (UTC−7).
Best time for a meeting between MST and San Diego Time
MST and San Diego Time share 7 hours of the 9 AM–5 PM working day. Any time between 10:00 AM and 5:00 PM MST lands between 9:00 AM and 4:00 PM PST, inside working hours for both.
MST to San Diego Time FAQ
What is the time difference between MST and San Diego Time?
PST is 1 hour behind MST all year. 9:00 AM MST = 8:00 AM PST.
What is 9 AM MST in San Diego Time?
9:00 AM MST is 8:00 AM PST.
What is 12 PM (noon) MST in San Diego Time?
12:00 PM MST is 11:00 AM PST.
Is San Diego Time ahead of or behind MST?
PST is 1 hour behind MST, so it is earlier in San Diego 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 San Diego Time change for daylight saving time?
Yes. San Diego Time next changes on 14 Mar 2027, when clocks go forward one hour from PST to PDT.
What is the best time for a meeting between MST and San Diego Time?
MST and San Diego Time share 7 hours of the 9 AM–5 PM working day. Any time between 10:00 AM and 5:00 PM MST lands between 9:00 AM and 4:00 PM PST, 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 San Diego Time to MST
Convert MST to other time zones
Convert other time zones to San Diego Time
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.