Mountain Time is 1 hour ahead of Pacific Daylight Time.

Frequently asked

Quick answers about converting between Mountain Time and Pacific Daylight Time. Can't find what you need? Email [email protected].

What is the time difference between Mountain Time and Pacific Daylight Time?

Mountain Time is 1 hour ahead of Pacific Daylight Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.

When it's 9am in Mountain Time, what time is it in Pacific Daylight Time?

9am in Mountain Time is 8am in Pacific Daylight Time. Use the hour-by-hour table above to read any other time across — find the row and read the matching cell in the other column.

What's the best time for a call between Mountain Time and Pacific Daylight Time?

10am–5pm in Mountain Time lines up with 9am–4pm in Pacific Daylight Time — both sides are inside a 9-to-5 working day.

Does this account for daylight saving time?

Yes. We track every clock change in both places, so the abbreviations you see — MDT and PDT — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.

Why is the date sometimes different on each side?

When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.