British Summer Time
BST means UTC+01:00 throughout the year. London follows regional clock rules and uses UTC on your selected date.
Use London for local civil time →Other meanings: Bangladesh Standard Time.
TIME ZONE CONVERTER
BST to MST
Time Converter
Convert British Summer Time to Mountain Standard Time. Compare dates, seasonal differences and meeting hours.
BST is 8h ahead of MST in 2026.
9 AM BST = 1 AM MST
Selected date: November 10, 2026. Fixed abbreviations retain their stated UTC offsets.
THE QUICK REFERENCE
CSVBST to MST conversion table
November 10, 2026 · Date changes are marked.
View the full 24-hour table
| BST | MST |
|---|---|
| 12:00 AM | 4:00 PM -1 day |
| 1:00 AM | 5:00 PM -1 day |
| 2:00 AM | 6:00 PM -1 day |
| 3:00 AM | 7:00 PM -1 day |
| 4:00 AM | 8:00 PM -1 day |
| 5:00 AM | 9:00 PM -1 day |
| 6:00 AM | 10:00 PM -1 day |
| 7:00 AM | 11:00 PM -1 day |
| 8:00 AM | 12:00 AM |
| 9:00 AM | 1:00 AM |
| 10:00 AM | 2:00 AM |
| 11:00 AM | 3:00 AM |
| BST | MST |
|---|---|
| 12:00 PM | 4:00 AM |
| 1:00 PM | 5:00 AM |
| 2:00 PM | 6:00 AM |
| 3:00 PM | 7:00 AM |
| 4:00 PM | 8:00 AM |
| 5:00 PM | 9:00 AM |
| 6:00 PM | 10:00 AM |
| 7:00 PM | 11:00 AM |
| 8:00 PM | 12:00 PM |
| 9:00 PM | 1:00 PM |
| 10:00 PM | 2:00 PM |
| 11:00 PM | 3:00 PM |
Starting with the MST working day
These examples start on 2026-11-10 in MST.
09:00 MST17:00 →BST · 2026-11-10
17:00 MST01:00 →BST · 2026-11-11
Which time-zone meaning are we using?
Mountain Standard Time
MST means UTC−07:00 throughout the year. Mountain Time follows regional clock rules and uses UTC−07:00 on your selected date.
Use MT for local civil time →ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 BST to MST throughout 2026
09:00 in BST converts to 01:00 in MST on every date in 2026. The destination has the same calendar date.
Every calendar date is included, not just workdays. Date ranges include both endpoints. Based on IANA 2026e; future rules may change.
DON’T LOSE A DAY
When does BST time become a different date in MST?
Your complete source day: 2026-11-10. Each range shows which destination date to use.
BST · 2026-11-1000:00–08:00UTC+01:00
MST · 2026-11-0916:00–24:00UTC−07:00 Previous day
BST · 2026-11-1008:00–24:00UTC+01:00
MST · 2026-11-1000:00–16:00UTC−07:00 Same date
Range starts are included; ends are excluded. 24:00 means midnight at the end of that date. Repeated hours appear separately with their UTC offsets. The strip is proportional to elapsed time.
THE BIGGER PICTURE
2026Some things stay in sync.
The difference between BST and MST stays the same throughout 2026.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
−8h
Neither selected clock changes its UTC offset during 2026.
CLOCK CHANGES
No upcoming clock adjustment
Both selected labels are fixed offsets, so seasonal clock changes do not alter this conversion.
PLAN BEYOND A SINGLE DAY
Daily CSVBST–MST working hours through 2026
Every date calculated with your working windows. 261 selected BST workdays; public holidays are not applied.
Least shared time0h
Most common0h
Most shared time0h
Days without a 60-min slot261 / 261
One fixed start time does not fit every working day.
Your working windows never overlap on the selected host workdays this year. Adjust working days, hours or duration above, or use different seasonal meeting times.
BST: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. MST: 09:00–17:00, Mon, Tue, Wed, Thu, Fri.
Calculation details and repeated hours
Overnight shifts belong to their start weekday. Host workday means the source calendar date. Repeated local times use the first occurrence.
THE DETAILS THAT MATTER
BST to MST: useful answers
Is BST / MST the same as local city time?
BST is fixed at UTC+01:00; MST is fixed at UTC−07:00. London to Denver (MT) uses regional rules instead. On 2026-11-10, 09:00 at the source becomes 02:00 at the destination (MST). Choose the local-city option above when that is the clock you mean.
Which cities match BST throughout 2026?
Lagos, Nigeria; Kinshasa, Congo - Kinshasa; Luanda, Angola; Abuja, Nigeria keep the same UTC+01:00 offset as fixed BST throughout 2026 under the published rules. Matching an offset does not mean every place uses the abbreviation BST.
Which cities match MST throughout 2026?
Phoenix, United States keep the same UTC−07:00 offset as fixed MST throughout 2026 under the published rules. Matching an offset does not mean every place uses the abbreviation MST.
Does the BST–MST time difference change in 2026?
The difference stays constant throughout 2026: MST is 8h behind compared with BST.
Does this conversion change the calendar date?
09:00 in BST on 2026-11-10 is 01:00 in MST on 2026-11-10. This selected time stays on the same date in both places. Other times can cross midnight.
Can BST and MST meet during working hours?
Your selected working windows have no shared time on 2026-11-10. The planner shows alternatives and how many minutes fall outside each person's working hours. Try another date or adjust the windows.
Related time-zone meanings and conversions
Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology