What is the time difference between Warsaw and London?

London is 1 hour behind Warsaw. 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 Warsaw?

Between 10:00–18:00 in Warsaw, which is 09:00–17:00 in London. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Warsaw observe daylight saving time?

Yes. Warsaw runs on UTC+1 in winter and UTC+2 in summer. The next change is on 2026-10-25, 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 Warsaw, what time is it in London?

It is 11:00 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 Warsaw and London use?

Warsaw uses Europe/Warsaw, currently UTC+2 (CEST), 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 Warsaw time to London time

Right now London runs 1 hour behind Warsaw. 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 Warsaw, and what the clock reads in London at that same moment.

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

Daylight saving time

Both cities change their clocks, but not necessarily on the same date — which is why the difference between them shifts for a few weeks each year.

Warsaw

Observes daylight saving time

Standard: UTC+1
Daylight: UTC+2
Next change: 2026-10-25 −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 8 hours wide — 10:00–18:00 in Warsaw, 09:00–17:00 in London.

Warsaw 10:00–18:00London 09:00–17:00

Reference

The zone identifiers and offsets behind everything above.

	Warsaw	London
IANA zone	Europe/Warsaw	Europe/London
Abbreviation	CEST	BST
Standard offset	UTC+1	UTC+0
Daylight offset	UTC+2	UTC+1
Clock changes this year	2	2
Country	Poland	United Kingdom

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

Common questions

What is the time difference between Warsaw and London?: London is 1 hour behind Warsaw. 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 Warsaw?: Between 10:00–18:00 in Warsaw, which is 09:00–17:00 in London. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Warsaw observe daylight saving time?: Yes. Warsaw runs on UTC+1 in winter and UTC+2 in summer. The next change is on 2026-10-25, 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 Warsaw, what time is it in London?: It is 11:00 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 Warsaw and London use?: Warsaw uses Europe/Warsaw, currently UTC+2 (CEST), and London uses Europe/London, currently UTC+1 (BST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.