What is the time difference between Denver and London?

London is 7 hours ahead of Denver. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.

When is the best time to call London from Denver?

Between 09:00–11:00 in Denver, which is 16:00–18:00 in London. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Denver observe daylight saving time?

Yes. Denver runs on UTC-7 in winter and UTC-6 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.

Does London observe daylight saving time?

Yes. London runs on UTC+0 in winter and UTC+1 in summer. The next change is on 2026-10-25, when clocks go back by 60 minutes.

If it is midday in Denver, what time is it in London?

It is 19:00 in London, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do Denver and London use?

Denver uses America/Denver, currently UTC-6 (MDT), and London uses Europe/London, currently UTC+1 (BST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Denver time to London time

Right now London runs 7 hours ahead of Denver. That gap is not fixed: it moves when either city changes its clocks.

Convert a time

From

Date

Time

Converted time

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The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

Every hour of a day in Denver, and what the clock reads in London at that same moment.

Denver	London
00:00	07:00
01:00	08:00
02:00	09:00
03:00	10:00
04:00	11:00
05:00	12:00
06:00	13:00
07:00	14:00
08:00	15:00
09:00	16:00
10:00	17:00
11:00	18:00
12:00	19:00
13:00	20:00
14:00	21:00
15:00	22:00
16:00	23:00
17:00	00:00next day
18:00	01:00next day
19:00	02:00next day
20:00	03:00next day
21:00	04:00next day
22:00	05:00next day
23:00	06:00next day

Daylight saving time

Denver and London both observe daylight saving. Where their change dates differ, so does the gap between them for the weeks in between.

Denver

Observes daylight saving time

Standard: UTC-7
Daylight: UTC-6
Next change: 2026-11-01 −60m

London

Observes daylight saving time

Standard: UTC+0
Daylight: UTC+1
Next change: 2026-10-25 −60m

When you can actually talk

The window is 2 hours wide — 09:00–11:00 in Denver, 16:00–18:00 in London.

Denver 09:00–11:00London 16:00–18:00

Reference

The underlying data, in case you need to put it in a calendar invitation or a configuration file.

	Denver	London
IANA zone	America/Denver	Europe/London
Abbreviation	MDT	BST
Standard offset	UTC-7	UTC+0
Daylight offset	UTC-6	UTC+1
Clock changes this year	2	2
Country	United States	United Kingdom

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between Denver and London?: London is 7 hours ahead of Denver. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.
When is the best time to call London from Denver?: Between 09:00–11:00 in Denver, which is 16:00–18:00 in London. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Denver observe daylight saving time?: Yes. Denver runs on UTC-7 in winter and UTC-6 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.
Does London observe daylight saving time?: Yes. London runs on UTC+0 in winter and UTC+1 in summer. The next change is on 2026-10-25, when clocks go back by 60 minutes.
If it is midday in Denver, what time is it in London?: It is 19:00 in London, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.
Which time zones do Denver and London use?: Denver uses America/Denver, currently UTC-6 (MDT), and London uses Europe/London, currently UTC+1 (BST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.