Sydney to London time: difference and best time to call

How to read it

Sydney and London, side by side

Each row is one city's day, half an hour to a square, lined up by the hours along the bottom.

A

Sydney

London

Sydney time

00:0003:0006:0009:0012:0015:0018:0021:00

London time

14:0017:0020:0023:0002:0005:0008:0011:00

Filled: at the desk, 9:00 to 18:00 where that city is.
Grey: up early, up late, or the weekend.
Outline: asleep.
Red band: your slot. Read straight down to see the same moment in every city.
A marks the best time for everyone; B, when there is one, the next best.

The red band is the best time to call on Wed, 21 Oct 2026: 19:00–20:00 in Sydney, which is 09:00–10:00 in London.

Through the year

How the gap between Sydney and London moves

London is 10h behind Sydney today. Daylight saving moves it:

11h

9h

London 10h behind Sydney
London 11h behind Sydney
London 9h behind Sydney

Sun, 25 Oct 2026 London's clocks go back an hour. London is then 11h behind Sydney.
Sun, 28 Mar 2027 London's clocks go forward an hour. London is then 10h behind Sydney.
Sun, 4 Apr 2027 Sydney's clocks go back an hour. London is then 9h behind Sydney.
Sun, 3 Oct 2027 Sydney's clocks go forward an hour. London is then 10h behind Sydney.

Hour by hour

Sydney to London time, hour by hour

On a working day (Wed, 21 Oct 2026), with working hours of 9:00 to 18:00 in both cities.

Sydney starts work 09:00 23:00 Tue in London Asleep
London starts work 09:00 19:00 in Sydney Late
Sydney finishes work 18:00 08:00 in London Early
London finishes work 18:00 04:00 Wed in Sydney Asleep

Show all 24 hours

Sydney	London
00:00 Asleep	14:00 Tue At desk
01:00 Asleep	15:00 Tue At desk
02:00 Asleep	16:00 Tue At desk
03:00 Asleep	17:00 Tue At desk
04:00 Asleep	18:00 Tue Late
05:00 Asleep	19:00 Tue Late
06:00 Asleep	20:00 Tue Late
07:00 Early	21:00 Tue Late
08:00 Early	22:00 Tue Asleep
09:00 At desk	23:00 Tue Asleep
10:00 At desk	00:00 Asleep
11:00 At desk	01:00 Asleep
12:00 At desk	02:00 Asleep
13:00 At desk	03:00 Asleep
14:00 At desk	04:00 Asleep
15:00 At desk	05:00 Asleep
16:00 At desk	06:00 Asleep
17:00 At desk	07:00 Early
18:00 Late	08:00 Early
19:00 Late	09:00 At desk
20:00 Late	10:00 At desk
21:00 Late	11:00 At desk
22:00 Asleep	12:00 At desk
23:00 Asleep	13:00 At desk

Questions

Questions people ask

What is the time difference between Sydney and London?

London is 10h behind Sydney (as of Wed, 21 Oct 2026). That changes on Sun, 25 Oct 2026, when London's clocks go back: then London is 11h behind Sydney.

What is the best time for a call between Sydney and London?

On a working day, the best time for a call is 19:00–20:00 in Sydney (09:00–10:00 in London) until 24 Oct 2026 and from 28 Mar 2027 to 3 Apr 2027 and from 3 Oct 2027, and 20:00–21:00 in Sydney (09:00–10:00 in London) from 25 Oct 2026 to 27 Mar 2027, and 16:00–17:00 in Sydney (07:00–08:00 in London) from 4 Apr 2027 to 2 Oct 2027.

Does Sydney change its clocks?

Yes. Sydney moves its clocks back an hour on Sun, 4 Apr 2027, and forward an hour on Sun, 3 Oct 2027.

Does London change its clocks?

Yes. London moves its clocks back an hour on Sun, 25 Oct 2026, and forward an hour on Sun, 28 Mar 2027.

More city pairs

Compare more cities

All 190 city pairs

From the team behind 10:10

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Sydney and London: time difference and the best time to call