What is the time difference between Adelaide and London?

London is 8 hours 30 minutes behind Adelaide. 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 Adelaide?

Between 17:30–18:00 in Adelaide, which is 09:00–09:30 in London. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Adelaide observe daylight saving time?

Yes. Adelaide runs on UTC+9:30 in winter and UTC+10:30 in summer. The next change is on 2026-10-04, when clocks go forward 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 Adelaide, what time is it in London?

It is 03:30 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 Adelaide and London use?

Adelaide uses Australia/Adelaide, currently UTC+9:30 (ACST), 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 Adelaide time to London time

Right now London runs 8 hours 30 minutes behind Adelaide. 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

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

Adelaide	London
00:00	15:30previous day
01:00	16:30previous day
02:00	17:30previous day
03:00	18:30previous day
04:00	19:30previous day
05:00	20:30previous day
06:00	21:30previous day
07:00	22:30previous day
08:00	23:30previous day
09:00	00:30
10:00	01:30
11:00	02:30
12:00	03:30
13:00	04:30
14:00	05:30
15:00	06:30
16:00	07:30
17:00	08:30
18:00	09:30
19:00	10:30
20:00	11:30
21:00	12:30
22:00	13:30
23:00	14:30

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.

Adelaide

Observes daylight saving time

Standard: UTC+9:30
Daylight: UTC+10:30
Next change: 2026-10-04 +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 30 minutes wide — 17:30–18:00 in Adelaide, 09:00–09:30 in London.

Adelaide 17:30–18:00London 09:00–09:30

Reference

The zone identifiers and offsets behind everything above.

	Adelaide	London
IANA zone	Australia/Adelaide	Europe/London
Abbreviation	ACST	BST
Standard offset	UTC+9:30	UTC+0
Daylight offset	UTC+10:30	UTC+1
Clock changes this year	2	2
Country	Australia	United Kingdom

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

Common questions

What is the time difference between Adelaide and London?: London is 8 hours 30 minutes behind Adelaide. 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 Adelaide?: Between 17:30–18:00 in Adelaide, which is 09:00–09:30 in London. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Adelaide observe daylight saving time?: Yes. Adelaide runs on UTC+9:30 in winter and UTC+10:30 in summer. The next change is on 2026-10-04, when clocks go forward 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 Adelaide, what time is it in London?: It is 03:30 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 Adelaide and London use?: Adelaide uses Australia/Adelaide, currently UTC+9:30 (ACST), and London uses Europe/London, currently UTC+1 (BST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.