What is the time difference between London and Sydney?

Sydney is 9 hours 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 Sydney from London?

There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.

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 Sydney observe daylight saving time?

Yes. Sydney runs on UTC+10 in winter and UTC+11 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 Sydney?

It is 21:00 in Sydney, 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 Sydney use?

London uses Europe/London, currently UTC+1 (BST), and Sydney uses Australia/Sydney, currently UTC+10 (AEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert London time to Sydney time

Sydney is 9 hours ahead of London right now, so midday in London lands in the evening in Sydney.

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

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

Daylight saving time

London and Sydney both observe daylight saving. Where their change dates differ, so does the gap between them for the weeks in between.

London

Observes daylight saving time

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

Sydney

Observes daylight saving time

Standard: UTC+10
Daylight: UTC+11
Next change: 2026-10-04 +60m

When you can actually talk

A standard working day in London and one in Sydney do not overlap at all. Any call between them is early for one side or late for the other.

London 01:00–18:00Sydney 10:00–03:00
London 00:00–01:00Sydney 09:00–10:00

Reference

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

	London	Sydney
IANA zone	Europe/London	Australia/Sydney
Abbreviation	BST	AEST
Standard offset	UTC+0	UTC+10
Daylight offset	UTC+1	UTC+11
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 Sydney?: Sydney is 9 hours 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 Sydney from London?: There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.
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 Sydney observe daylight saving time?: Yes. Sydney runs on UTC+10 in winter and UTC+11 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 Sydney?: It is 21:00 in Sydney, 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 Sydney use?: London uses Europe/London, currently UTC+1 (BST), and Sydney uses Australia/Sydney, currently UTC+10 (AEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.