What is the time difference between London and Denver?

Denver is 7 hours behind London. 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 Denver from London?

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

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.

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.

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

It is 05:00 in Denver, 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 London and Denver use?

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

Convert London time to Denver time

Denver is 7 hours behind London right now, so midday in London lands in the small hours in Denver.

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

The whole day mapped across: read down the left for London, across for Denver.

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

Daylight saving time

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

London

Observes daylight saving time

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

Denver

Observes daylight saving time

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

When you can actually talk

You have 2 hours of shared working time: 16:00–18:00 in London, which is 09:00–11:00 in Denver.

London 16:00–18:00Denver 09:00–11:00

Reference

The zone identifiers and offsets behind everything above.

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

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

Common questions

What is the time difference between London and Denver?: Denver is 7 hours behind London. 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 Denver from London?: Between 16:00–18:00 in London, which is 09:00–11:00 in Denver. That is the only stretch where both cities are inside a 09:00–18:00 day.
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.
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.
If it is midday in London, what time is it in Denver?: It is 05:00 in Denver, 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 London and Denver use?: London uses Europe/London, currently UTC+1 (BST), and Denver uses America/Denver, currently UTC-6 (MDT). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.