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

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

MST to UTC Time Converter

Mountain Standard Time → Coordinated Universal Time

MST = UTC-6UTC = UTC+0

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

UTC (London)

United Kingdom · +7h

16:00

New York

USA · +2h

11:00

Tokyo

Japan · +15h

00:00+1 day

Dubai

United Arab Emirates · +10h

19:00

Sydney

Australia · +16h

01:00+1 day

MST (Denver) to UTC (London) — exact time difference

MST (Denver) is 6 hours behind UTC (London). When MST (Denver) clocks hit noon, UTC (London) reads 18:00.

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

Working hours overlap

Every working day, MST (Denver) and UTC (London) are both in business hours for 2 hours simultaneously.

00:0006:0012:0018:0024:00

MST (Denver)

UTC (London)

Overlap (2h)

When to schedule across time zones

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

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

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

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

Holiday calendar for both locations

MST (Denver)7 holidays

Jul 3Independence DaySOON

Sep 7Labour Day

Oct 12Columbus Day

Oct 12Indigenous Peoples' Day

Nov 11Veterans Day

UTC (London)

No upcoming public holidays this year.

Working across MST (Denver) and UTC (London)

Working across MST (Denver) (USA) and UTC (London) (United Kingdom) 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.

💡 Best practice for cross-timezone meetings

✅

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

✅

10:00–11:00 in MST (Denver) = 16:00–17:00 in UTC (London). 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 MST (Denver). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.

MST (Denver) ↔ UTC (London)

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

MST (Denver)

UTC (London)

00:00

06:00

01:00

07:00

02:00

08:00