MST is 1 hour ahead of PST all year. So 12:00 PM PDT = 1:00 PM MDT. (Pacific Time is on PDT and Mountain Time is on MDT for daylight saving time right now.)
PST to MST conversion table
| PST / PDT | MST / MDT |
|---|---|
| 12:00 AM | 1:00 AM |
| 1:00 AM | 2:00 AM |
| 2:00 AM | 3:00 AM |
| 3:00 AM | 4:00 AM |
| 4:00 AM | 5:00 AM |
| 5:00 AM | 6:00 AM |
| 6:00 AM | 7:00 AM |
| 7:00 AM | 8:00 AM |
| 8:00 AM | 9:00 AM |
| 9:00 AM | 10:00 AM |
| 10:00 AM | 11:00 AM |
| 11:00 AM | 12:00 PM |
| 12:00 PM | 1:00 PM |
| 1:00 PM | 2:00 PM |
| 2:00 PM | 3:00 PM |
| 3:00 PM | 4:00 PM |
| 4:00 PM | 5:00 PM |
| 5:00 PM | 6:00 PM |
| 6:00 PM | 7:00 PM |
| 7:00 PM | 8:00 PM |
| 8:00 PM | 9:00 PM |
| 9:00 PM | 10:00 PM |
| 10:00 PM | 11:00 PM |
| 11:00 PM | 12:00 AM +1 day |
PST and MST difference through 2027
The gap between the two zones on each date range, including daylight saving time changes:
| Dates | Pacific Time | Mountain Time | Difference |
|---|---|---|---|
| Sep 30, 2026 – Oct 31, 2026 | PDT (UTC−7) | MDT (UTC−6) | MST 1 hour ahead |
| Nov 1, 2026 – Mar 13, 2027 | PST (UTC−8) | MST (UTC−7) | MST 1 hour ahead |
| Mar 14, 2027 – Nov 6, 2027 | PDT (UTC−7) | MDT (UTC−6) | MST 1 hour ahead |
| Nov 7, 2027 – Dec 31, 2027 | PST (UTC−8) | MST (UTC−7) | MST 1 hour ahead |
Best time to meet or call
- Working hours (9 AM–5 PM) overlap from 9:00 AM–4:00 PM PST (10:00 AM–5:00 PM MST), about 7 hours.
About Pacific Time (PST)
Pacific Time uses PST (UTC−8) in winter and PDT (UTC−7) during daylight saving time. It's used in Los Angeles, San Francisco, San Diego, Seattle, Portland, Las Vegas and Vancouver.
About Mountain Time (MST)
Mountain Time uses MST (UTC−7) in winter and MDT (UTC−6) in summer. Most of Arizona stays on MST all year and does not change its clocks. It's used in Denver, Salt Lake City, Albuquerque, Boise, El Paso and Calgary.
Frequently asked questions
What time is 12 PM PST in MST?
12:00 PM PDT is 1:00 PM MDT.
How many hours ahead or behind is MST from PST?
MST is 1 hour ahead of PST, all year.
Does PST change for daylight saving time?
Yes. Pacific Time uses PST (UTC−8) in winter and PDT (UTC−7) during daylight saving time.
Does MST change for daylight saving time?
Yes. Mountain Time uses MST (UTC−7) in winter and MDT (UTC−6) in summer. Most of Arizona stays on MST all year and does not change its clocks.
What is the best time for a call between PST and MST?
Right now, working hours overlap from 9:00 AM–4:00 PM PST (10:00 AM–5:00 PM MST), about 7 hours.
Is it PST or PDT right now?
Pacific Time uses PST in winter and PDT from the second Sunday in March to the first Sunday in November. The live clock on this page shows which one applies today.
More time zone conversions
- MST to PST (reverse)
- PST to EST
- EST to MST
- PST to CST
- CST to MST
- PST to IST
- PST to GMT
- PST to UTC
- All time zones
Sources
Reviewed by Gurmej Singh, Founder, Divy Digital Hub · Last reviewed: Wednesday, September 30, 2026. All calculations run in your browser. Editorial policy.