BST to MST Converter
See the current time in BST (London) and MST (Denver) side by side, the exact time difference right now, and convert any time between the two zones.
BST to MST Converter
Uses your browser's built-in, DST-aware time-zone data.
About converting BST to MST
British Time (London) (London) and Mountain Time (Denver) are in different time zones, so a meeting, call or stream that's convenient in one may be early or late in the other. The clocks above update live and account for daylight saving automatically, so the time difference you see is the real one for today — not a fixed number that goes stale twice a year.
To plan across the two, type a time into the BST box (or tap a quick preset) and read the MST equivalent, including a "next day" or "previous day" note when the conversion crosses midnight. For any other pair of zones or cities, use the full timezone converter.
BST vs MST: the time difference through the year
The gap between BST and MST changes during the year because they switch to and from daylight saving on different dates.
| Period | Difference |
|---|---|
| Oct 23, 2026 – Oct 24, 2026 | MST 7 h behind BST |
| Oct 25, 2026 – Oct 31, 2026 | MST 6 h behind BST |
| Nov 1, 2026 – Mar 13, 2027 | MST 7 h behind BST |
| Mar 14, 2027 – Mar 27, 2027 | MST 6 h behind BST |
| Mar 28, 2027 – Oct 23, 2027 | MST 7 h behind BST |
Daylight-saving changes in the next year
| Zone | Date | Offset | Change |
|---|---|---|---|
| BST | Oct 25, 2026 | UTC+1 → UTC+0 | Clocks go back 1 hour |
| BST | Mar 28, 2027 | UTC+0 → UTC+1 | Clocks go forward 1 hour |
| BST | Oct 31, 2027 | UTC+1 → UTC+0 | Clocks go back 1 hour |
| MST | Nov 1, 2026 | UTC−6 → UTC−7 | Clocks go back 1 hour |
| MST | Mar 14, 2027 | UTC−7 → UTC−6 | Clocks go forward 1 hour |
| MST | Nov 7, 2027 | UTC−6 → UTC−7 | Clocks go back 1 hour |
BST to MST conversion table
| BST | MST (when 7 h behind) | MST (when 6 h behind) |
|---|---|---|
| 12:00 AM | 5:00 PM (previous day) | 6:00 PM (previous day) |
| 1:00 AM | 6:00 PM (previous day) | 7:00 PM (previous day) |
| 2:00 AM | 7:00 PM (previous day) | 8:00 PM (previous day) |
| 3:00 AM | 8:00 PM (previous day) | 9:00 PM (previous day) |
| 4:00 AM | 9:00 PM (previous day) | 10:00 PM (previous day) |
| 5:00 AM | 10:00 PM (previous day) | 11:00 PM (previous day) |
| 6:00 AM | 11:00 PM (previous day) | 12:00 AM |
| 7:00 AM | 12:00 AM | 1:00 AM |
| 8:00 AM | 1:00 AM | 2:00 AM |
| 9:00 AM | 2:00 AM | 3:00 AM |
| 10:00 AM | 3:00 AM | 4:00 AM |
| 11:00 AM | 4:00 AM | 5:00 AM |
| 12:00 PM | 5:00 AM | 6:00 AM |
| 1:00 PM | 6:00 AM | 7:00 AM |
| 2:00 PM | 7:00 AM | 8:00 AM |
| 3:00 PM | 8:00 AM | 9:00 AM |
| 4:00 PM | 9:00 AM | 10:00 AM |
| 5:00 PM | 10:00 AM | 11:00 AM |
| 6:00 PM | 11:00 AM | 12:00 PM |
| 7:00 PM | 12:00 PM | 1:00 PM |
| 8:00 PM | 1:00 PM | 2:00 PM |
| 9:00 PM | 2:00 PM | 3:00 PM |
| 10:00 PM | 3:00 PM | 4:00 PM |
| 11:00 PM | 4:00 PM | 5:00 PM |
Best time to meet
- 9 AM–5 PM overlap when MST is 7 h behind4:00 PM–5:00 PM BST = 9:00 AM–10:00 AM MST (1 h)
- 9 AM–5 PM overlap when MST is 6 h behind3:00 PM–5:00 PM BST = 9:00 AM–11:00 AM MST (2 h)
The two zones
UK time is GMT (UTC+0) in winter and British Summer Time (BST, UTC+1) from the last Sunday in March to the last Sunday in October. Ireland and Portugal follow the same switch dates.
Mountain Time is UTC−7 in winter (MST) and UTC−6 in summer (MDT) for Denver, Salt Lake City and Calgary. Most of Arizona stays on MST (UTC−7) all year.