What is the time difference between London and Adelaide?

Adelaide is 8 hours 30 minutes 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 Adelaide from London?

Between 09:00–09:30 in London, which is 17:30–18:00 in Adelaide. 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 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.

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

It is 20:30 in Adelaide, 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 Adelaide use?

London uses Europe/London, currently UTC+1 (BST), and Adelaide uses Australia/Adelaide, currently UTC+9:30 (ACST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert London time to Adelaide time

Adelaide is 8 hours 30 minutes ahead of London right now, so midday in London lands in the evening in Adelaide.

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 Adelaide.

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

Adelaide

Observes daylight saving time

Standard: UTC+9:30
Daylight: UTC+10:30
Next change: 2026-10-04 +60m

When you can actually talk

The window is 30 minutes wide — 09:00–09:30 in London, 17:30–18:00 in Adelaide.

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

Reference

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

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

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

Common questions

What is the time difference between London and Adelaide?: Adelaide is 8 hours 30 minutes 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 Adelaide from London?: Between 09:00–09:30 in London, which is 17:30–18:00 in Adelaide. 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 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.
If it is midday in London, what time is it in Adelaide?: It is 20:30 in Adelaide, 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 Adelaide use?: London uses Europe/London, currently UTC+1 (BST), and Adelaide uses Australia/Adelaide, currently UTC+9:30 (ACST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.