Coordinated Universal Time (utc) is used in United Kingdom. The IANA timezone identifier is UTC.

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

UTC to MST Time Converter

Coordinated Universal Time → Mountain Standard Time

UTC = UTC+0MST = UTC-6

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

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

UTC (London) is 6 hours ahead of MST (Denver). Midday in UTC (London) lines up with 06:00 in MST (Denver).

UTC (London) is in the Europe/London timezone. MST (Denver) is in America/Denver. The difference is 6 hours.

Mutual working hours

There is a 2-hour window each day where both UTC (London) and MST (Denver) are within standard business hours (09:00–17:00).

00:0006:0012:0018:0024:00

UTC (London)

MST (Denver)

Overlap (2h)

When to schedule across time zones

Both UTC (London) and MST (Denver) are in standard hours simultaneously for 2h per day.

15:00 London / 09:00 Denver✓ Both working

16:00 London / 10:00 Denver✓ Both working

Based on standard 09:00–17:00 working hours in each location's local time.

Upcoming public holidays

UTC (London)

No upcoming public holidays this year.

MST (Denver)7 holidays

Jul 3Independence DaySOON

Sep 7Labour Day

Oct 12Columbus Day

Oct 12Indigenous Peoples' Day

Nov 11Veterans Day

How to work with UTC (London) and MST (Denver) time zones

Working across UTC (London) (United Kingdom) and MST (Denver) (USA) involves a 6-hour gap. The good news: there is a 2-hour mutual window in standard business hours that lets both sides collaborate without anyone joining at an unreasonable hour.

💡 How to schedule across these time zones

✅

15:00–16:00 in UTC (London) = 09:00–10:00 in MST (Denver). Both sides are in standard business hours during this window.

✅

16:00–17:00 in UTC (London) = 10:00–11:00 in MST (Denver). Both sides are in standard business hours during this window.

DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.

Get the Extension — Free →

Use the time slider above to find the exact equivalent time for any moment in UTC (London). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.

UTC (London) ↔ MST (Denver)

2h of business hours overlap daily (09:00–17:00)

UTC (London)

MST (Denver)

00:00

18:00-1d

01:00

19:00-1d

02:00

20:00-1d

03:00

21:00-1d

04:00

22:00-1d

05:00

23:00-1d

06:00

00:00

07:00

01:00

08:00

02:00

09:00Working

03:00off

10:00Working

04:00off

11:00Working

05:00off

12:00Working

06:00off

13:00Working

07:00off

14:00Working

08:00off

15:00Working

09:00Working

16:00Working

10:00Working

17:00

11:00Working

18:00

12:00Working

19:00

13:00Working

20:00

14:00Working

21:00

15:00Working

22:00

16:00Working

23:00

17:00

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

Frequently Asked Questions

What is the difference between utc and mst?

Coordinated Universal Time (utc) is UTC+0 and Mountain Standard Time (mst) is UTC-6. The difference between them is 6 hours.

Where is utc used?

Coordinated Universal Time (utc) is used in United Kingdom and surrounding regions. The IANA timezone identifier is UTC.

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 utc to mst?

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

Popular UTC conversions

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