San Diego Time to MST Converter
MST is 1 hour ahead of PST. 9:00 AM PST = 10:00 AM MST.
MST is 1 hour ahead of PST. To convert San Diego Time to MST, add 1 hour to the San Diego Time time: 9:00 AM PST = 10:00 AM MST.
San Diego Time (San Diego time) is used in San Diego, USA. 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.
San Diego Time to MST time conversion table
San Diego Time to MST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| San Diego Time | MST | Day |
|---|---|---|
| 12:00 AM PST | 1:00 AM MST | night |
| 1:00 AM PST | 2:00 AM MST | night |
| 2:00 AM PST | 3:00 AM MST | night |
| 3:00 AM PST | 4:00 AM MST | night |
| 4:00 AM PST | 5:00 AM MST | night |
| 5:00 AM PST | 6:00 AM MST | — |
| 6:00 AM PST | 7:00 AM MST | — |
| 7:00 AM PST | 8:00 AM MST | — |
| 8:00 AM PST | 9:00 AM MST | — |
| 9:00 AM PST | 10:00 AM MST | work hours |
| 10:00 AM PST | 11:00 AM MST | work hours |
| 11:00 AM PST | 12:00 PM MST | work hours |
| 12:00 PM PST | 1:00 PM MST | work hours |
| 1:00 PM PST | 2:00 PM MST | work hours |
| 2:00 PM PST | 3:00 PM MST | work hours |
| 3:00 PM PST | 4:00 PM MST | work hours |
| 4:00 PM PST | 5:00 PM MST | — |
| 5:00 PM PST | 6:00 PM MST | — |
| 6:00 PM PST | 7:00 PM MST | — |
| 7:00 PM PST | 8:00 PM MST | — |
| 8:00 PM PST | 9:00 PM MST | — |
| 9:00 PM PST | 10:00 PM MST | night |
| 10:00 PM PST | 11:00 PM MST | night |
| 11:00 PM PST | 12:00 AM MST | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert San Diego Time to MST
Add 1 hour to the San Diego Time time to get MST.
Example: 9:00 AM PST = 10:00 AM MST.
Across midnight: 11:00 PM PST = 12:00 AM MST (next day). The date changes, so always check the day as well as the hour.
Time difference between San Diego Time and MST
The time difference between San Diego Time and MST is 1 hour all year – MST is ahead of PST.
San Diego Time and MST during daylight saving time
- 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).
- 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 San Diego Time and MST
San Diego Time and MST share 7 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 4:00 PM PST lands between 10:00 AM and 5:00 PM MST, inside working hours for both.
San Diego Time to MST FAQ
What is the time difference between San Diego Time and MST?
MST is 1 hour ahead of PST all year. 9:00 AM PST = 10:00 AM MST.
What is 9 AM San Diego Time in MST?
9:00 AM PST is 10:00 AM MST.
What is 12 PM (noon) San Diego Time in MST?
12:00 PM PST is 1:00 PM MST.
Is MST ahead of or behind San Diego Time?
MST is 1 hour ahead of PST, so it is later in MST than in San Diego Time.
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.
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 San Diego Time and MST?
San Diego Time and MST share 7 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 4:00 PM PST lands between 10:00 AM and 5:00 PM 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 San Diego Time
Convert San Diego Time to other time zones
Convert other time zones to MST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.