MST to PST Time Converter
Convert Mountain Time (US) to Pacific Time (US). Right now, MST is 1 hour ahead of PST.
Time Zone Converter
Click any hour to see what it lands on in every city. The first row's hours run 12am to 11pm — every other row is its local time at the same instant.
When it's this time in Denver:
| Denver | San Francisco |
|---|---|
| 6:00 AM | 5:00 AM |
| 9:00 AM | 8:00 AM |
| 12:00 PM | 11:00 AM |
| 3:00 PM | 2:00 PM |
| 6:00 PM | 5:00 PM |
| 9:00 PM | 8:00 PM |
About MST and PST
MST (Mountain Time (US)) covers USA and Canada and is anchored to the IANA zone America/Denver. It observes daylight saving time, so the offset shifts by one hour twice a year.
PST (Pacific Time (US)) covers USA and Canada via America/Los_Angeles. It observes daylight saving time, so the gap between these two zones shifts twice a year.
Because at least one of these zones uses DST, the time difference between MST and PST is not constant — it shifts by an hour during the spring and autumn DST transitions. The hour grid below recomputes the difference for any specific date you click, using the IANA rules baked into your browser.
FAQ
- How many hours difference between MST and PST?
- Right now, MST is 1 hour ahead of PST. Because at least one of these zones observes daylight saving time, the gap shifts by an hour twice a year (spring and autumn). The hour grid above recomputes correctly for any specific date.
- What time is 9 AM MST in PST?
- 9 AM MST (Denver) is 8:00 AM PST (San Francisco) today. Click any cell in the grid above to convert other times — the math handles DST and half-hour offsets correctly.
- Does MST observe daylight saving time?
- Yes. Mountain Time (US) shifts forward by one hour in the spring and back in the autumn. The exact dates depend on the country's rules — the IANA timezone database tracks them all and updates automatically.
- What's the IANA timezone identifier for MST and PST?
- MST → America/Denver. PST → America/Los_Angeles. We use IANA identifiers (not GMT offsets) as the source of truth so historical and future dates remain accurate, including across DST changes and political timezone shifts.
- Where can I see the overlap between MST and PST working hours?
- Click "Working hrs" in the toolbar above to highlight hours where all selected cities have overlapping business hours. The amber highlight shows which columns work for scheduling meetings across time zones.
- Which countries use MST and PST?
- MST (Mountain Time (US)) is used in USA and Canada. PST (Pacific Time (US)) is used in USA and Canada. If you're converting time between any of these countries, this is the right page.