British Summer Time (bst) is used in United Kingdom. The IANA timezone identifier is Europe/London.

Mountain Standard Time (mst) is used in USA. The IANA timezone identifier is America/Denver.

BST to MST Time Converter

British Summer Time → Mountain Standard Time

BST = UTC+1MST = UTC-6

⚠️ BST is ambiguous — on this page it means British Summer Time. It also refers to:

Bangladesh Standard Time (Dhaka) → MST ↗

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

MST (Denver)

USA · -7h

02:00

New York

USA · -5h

04:00

Tokyo

Japan · +8h

17:00

Dubai

United Arab Emirates · +3h

12:00

Sydney

Australia · +9h

18:00

BST (London) ↔ MST (Denver) — time offset

BST (London) is 7 hours ahead of MST (Denver). At noon in BST (London), your contact in MST (Denver) sees 05:00.

BST (London) runs on Europe/London; MST (Denver) runs on America/Denver. Together they are 7 hours apart.

Mutual working hours

BST (London) and MST (Denver) share 1 hour of overlapping business hours daily — enough for real-time collaboration without anyone joining at odd hours.

00:0006:0012:0018:0024:00

BST (London)

MST (Denver)

Overlap (1h)

Best call times between these locations

There is a 1-hour daily window where both locations are in business hours.

16:00 London / 09:00 Denver✓ Both working

Working hours defined as 09:00–17:00 local time for each location.

Public holidays for both locations

⚡ Holiday alerts for both locations, double-check schedules before confirming.

BST (London)6 holidays

Jul 13Battle of the Boyne

Aug 3Summer Bank Holiday

Aug 31Summer Bank Holiday

Nov 30Saint Andrew's Day

Dec 25Christmas Day

MST (Denver)7 holidays

Jul 3Independence DaySOON

Sep 7Labour Day

Oct 12Columbus Day

Oct 12Indigenous Peoples' Day

Nov 11Veterans Day

Scheduling between BST (London) and MST (Denver)

BST (London) (United Kingdom) and MST (Denver) (USA) are 7 hours apart. With a 1-hour daily overlap in standard business hours, both teams can connect in real time without either side stretching beyond their normal workday.

💡 Scheduling tips for these locations

✅

If you are in BST (London), aim for 16:00–17:00, which corresponds to 09:00–10:00 in MST (Denver) — both teams are within working hours.

Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.

Add to your browser — Free →

Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am BST (London)".

BST (London) ↔ MST (Denver)

1h of business hours overlap daily (09:00–17:00)

BST (London)

MST (Denver)

00:00

17:00-1d

01:00

18:00-1d

02:00

19:00-1d

03:00

20:00-1d

04:00

21:00-1d

05:00

22:00-1d

06:00

23:00-1d

07:00

00:00

08:00

01:00

09:00Working

02:00off

10:00Working

03:00off

11:00Working

04:00off

12:00Working

05:00off

13:00Working

06:00off

14:00Working

07:00off

15:00Working

08:00off

16:00Working

09:00Working

17:00

10:00Working

18:00

11:00Working

19:00

12:00Working

20:00

13:00Working

21:00

14:00Working

22:00

15:00Working

23:00

16:00Working

Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.

Frequently Asked Questions

What is the difference between bst and mst?

British Summer Time (bst) is UTC+1 and Mountain Standard Time (mst) is UTC-6. The difference between them is 7 hours.

Where is bst used?

British Summer Time (bst) is used in United Kingdom and surrounding regions. The IANA timezone identifier is Europe/London. Note: bst is ambiguous and may refer to other timezones.

Where is mst used?

Mountain Standard Time (mst) is used in USA and surrounding regions. The IANA timezone identifier is America/Denver.

How do I convert bst to mst?

Use the interactive converter above. Drag the time slider to any bst time and the mst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.

Popular BST conversions

BST → New York BST → Tokyo BST → Dubai BST → Sydney BST → Paris BST → Berlin BST → Singapore BST → Los Angeles BST → Toronto BST → Mumbai

Popular MST conversions

London → MST New York → MST Tokyo → MST Dubai → MST Sydney → MST Paris → MST Berlin → MST Singapore → MST Los Angeles → MST Toronto → MST