What is the time difference between London and Reykjavík?

Reykjavík is 1 hour 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 Reykjavík from London?

Between 10:00–18:00 in London, which is 09:00–17:00 in Reykjavík. 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 Reykjavík observe daylight saving time?

No. Reykjavík stays on UTC+0 all year, so its clocks never move.

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

It is 11:00 in Reykjavík, 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 Reykjavík use?

London uses Europe/London, currently UTC+1 (BST), and Reykjavík uses Atlantic/Reykjavik, currently UTC+0 (GMT). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert London time to Reykjavík time

Right now Reykjavík runs 1 hour behind London. That gap is not fixed: it moves when either city changes its clocks.

Convert a time

From

Date

Time

Converted time

—

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 Reykjavík.

London	Reykjavík
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

Reykjavík keeps one offset all year while London moves twice. That is the whole reason this difference is seasonal.

London

Observes daylight saving time

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

Reykjavík

Does not observe daylight saving time

Standard: UTC+0

When you can actually talk

You have 8 hours of shared working time: 10:00–18:00 in London, which is 09:00–17:00 in Reykjavík.

London 10:00–18:00Reykjavík 09:00–17:00

Reference

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

	London	Reykjavík
IANA zone	Europe/London	Atlantic/Reykjavik
Abbreviation	BST	GMT
Standard offset	UTC+0	UTC+0
Daylight offset	UTC+1	—
Clock changes this year	2	0
Country	United Kingdom	Iceland

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

Common questions

What is the time difference between London and Reykjavík?: Reykjavík is 1 hour 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 Reykjavík from London?: Between 10:00–18:00 in London, which is 09:00–17:00 in Reykjavík. 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 Reykjavík observe daylight saving time?: No. Reykjavík stays on UTC+0 all year, so its clocks never move.
If it is midday in London, what time is it in Reykjavík?: It is 11:00 in Reykjavík, 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 Reykjavík use?: London uses Europe/London, currently UTC+1 (BST), and Reykjavík uses Atlantic/Reykjavik, currently UTC+0 (GMT). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.