10pm in British Summer Time is 3pm in Mountain Time.

Frequently asked

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

What is the time difference between British Summer Time and Mountain Time?

British Summer Time is 7 hours ahead of Mountain 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 10pm in British Summer Time, what time is it in Mountain Time?

10pm in British Summer Time is 3pm in Mountain Time. It falls outside the 9-to-5 in British Summer Time but lands inside working hours in Mountain Time. Use the hour-by-hour table above to read any other time across.

What's the best time for a call between British Summer Time and Mountain Time?

4pm–5pm in British Summer Time lines up with 9am–10am in Mountain 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 — BST and MDT — 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.