What is the time difference between London and Oslo?

Oslo is 1 hour ahead of 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 Oslo from London?

Between 09:00–17:00 in London, which is 10:00–18:00 in Oslo. 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 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.

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

It is 13:00 in Oslo, 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 Oslo use?

London uses Europe/London, currently UTC+1 (BST), and Oslo uses Europe/Oslo, currently UTC+2 (CEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert London time to Oslo time

Oslo is 1 hour ahead of London right now, so midday in London lands in the afternoon in Oslo.

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 Oslo.

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

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.

London

Observes daylight saving time

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

Oslo

Observes daylight saving time

Standard: UTC+1
Daylight: UTC+2
Next change: 2026-10-25 −60m

When you can actually talk

The window is 8 hours wide — 09:00–17:00 in London, 10:00–18:00 in Oslo.

London 09:00–17:00Oslo 10:00–18:00

Reference

The zone identifiers and offsets behind everything above.

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

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

Common questions

What is the time difference between London and Oslo?: Oslo is 1 hour ahead of 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 Oslo from London?: Between 09:00–17:00 in London, which is 10:00–18:00 in Oslo. 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 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.
If it is midday in London, what time is it in Oslo?: It is 13:00 in Oslo, 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 Oslo use?: London uses Europe/London, currently UTC+1 (BST), and Oslo uses Europe/Oslo, currently UTC+2 (CEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.