MT to BST Time Converter
BST is 7 hours ahead of MT. The US Mountain states are currently on MDT (UTC-6:00), and BST is UTC+1:00.
Best Time to Call Between MT and BST
Both zones are inside normal business hours between 9:00 AM and 10:00 AM MT — that's 4:00 PM to 5:00 PM BST. That's a 1-hour window.
both at work MT only BST only neither — hours along the strip are MT.
Common Times Converted
MT on the left, BST on the right.
MT to BST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| MT | BST | Working hours |
|---|---|---|
| 12:00 AM | 7:00 AM | — |
| 1:00 AM | 8:00 AM | — |
| 2:00 AM | 9:00 AM | BST only |
| 3:00 AM | 10:00 AM | BST only |
| 4:00 AM | 11:00 AM | BST only |
| 5:00 AM | 12:00 PM | BST only |
| 6:00 AM | 1:00 PM | BST only |
| 7:00 AM | 2:00 PM | BST only |
| 8:00 AM | 3:00 PM | BST only |
| 9:00 AM | 4:00 PM | Both zones |
| 10:00 AM | 5:00 PM | MT only |
| 11:00 AM | 6:00 PM | MT only |
| 12:00 PM | 7:00 PM | MT only |
| 1:00 PM | 8:00 PM | MT only |
| 2:00 PM | 9:00 PM | MT only |
| 3:00 PM | 10:00 PM | MT only |
| 4:00 PM | 11:00 PM | MT only |
| 5:00 PM | 12:00 AM next day | — |
| 6:00 PM | 1:00 AM next day | — |
| 7:00 PM | 2:00 AM next day | — |
| 8:00 PM | 3:00 AM next day | — |
| 9:00 PM | 4:00 AM next day | — |
| 10:00 PM | 5:00 AM next day | — |
| 11:00 PM | 6:00 AM next day | — |
What MT and BST Actually Are
MT — Mountain Time
Denver, Salt Lake City, Calgary, Edmonton — and Phoenix, which does not change its clocks. Standing at UTC-7:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to MST.
Mountain Time contains the most conspicuous daylight saving exception in North America: Arizona, which has opted out since 1968.
BST — British Summer Time
London, Manchester, Birmingham, Glasgow, and the rest of the UK from late March to late October. Standing at UTC+1:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, October 25, 2026, to GMT. BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.
British Summer Time began in 1916 as a wartime fuel-saving measure and has run every year since, making it one of the oldest continuous daylight saving schemes in the world.
What This Means in Practice
Both sides change clocks, on different dates
Both regions observe daylight saving but do not switch on the same day, so for a week or two each spring and fall the gap between them is an hour different from the rest of the year. Those short windows are where recurring invitations quietly break.
Major Cities in Each Zone
Cities on MT
Cities on BST
Frequently Asked Questions
What is the time difference between MT and BST?
BST is 7 hours ahead of MT. That is the live figure. Taken strictly as written, the gap between MT and BST is 8 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM MT in BST?
9:00 AM MT is 4:00 PM BST.
What are the best hours to schedule a call between MT and BST?
Between 9:00 AM and 10:00 AM MT, which is 4:00 PM to 5:00 PM BST. Both sides are inside normal business hours through that window.
Does the difference between MT and BST change during the year?
Yes. Both regions observe daylight saving, and they do not switch on the same dates, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, November 1, 2026.
Does BST always mean British Summer Time?
BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.