What is the time difference between Oslo and London?

London is 1 hour behind Oslo. 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 Oslo?

Between 10:00–18:00 in Oslo, 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 Oslo observe daylight saving time?

Yes. Oslo 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 Oslo, 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 Oslo and London use?

Oslo uses Europe/Oslo, 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 Oslo time to London time

London is 1 hour behind Oslo right now, so midday in Oslo lands in the morning in London.

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 Oslo, and what the clock reads in London at that same moment.

Oslo	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.

Oslo

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 Oslo, 09:00–17:00 in London.

Oslo 10:00–18:00London 09:00–17:00

Reference

The zone identifiers and offsets behind everything above.

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

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

Common questions

What is the time difference between Oslo and London?: London is 1 hour behind Oslo. 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 Oslo?: Between 10:00–18:00 in Oslo, 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 Oslo observe daylight saving time?: Yes. Oslo 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 Oslo, 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 Oslo and London use?: Oslo uses Europe/Oslo, 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.