GMT to AEST: UK–Australia (Sydney) time difference and best meeting times
London to Sydney time · GMT/BST to AEST/AEDT
London and Sydney share no 9-to-5 working hours for most of the year. The fairest 1-hour meeting is 08:00 in London = 17:00 in Sydney.
London and Sydney are roughly half a day apart. Because their seasons are reversed, the time difference changes twice a year in opposite directions.
Time difference
Sydney is 9h ahead of London
Most of the year; see below for other dates.
Shared working hours
None
Standard 09:00–17:00 days don't meet.
Fairest 1-hour meeting
08:00 in London = 17:00 in Sydney
London stretches 1h, Sydney stretches 1h.
How the gap changes in 2027
- 4 Apr – 2 Oct (182 days): Sydney is 9h ahead of London. No shared standard hours; fairest meeting 08:00 in London = 17:00 in Sydney.
- 1 Jan – 27 Mar, 31 Oct – 31 Dec (148 days): Sydney is 11h ahead of London. No shared standard hours; fairest meeting 07:00 in London = 18:00 in Sydney.
- 28 Mar – 3 Apr, 3 Oct – 30 Oct (35 days): Sydney is 10h ahead of London. No shared standard hours; fairest meeting 07:30 in London = 17:30 in Sydney.
- London:
- UTC+0 standard, UTC+1 daylight saving
- Sydney:
- UTC+10 standard, UTC+11 daylight saving
- 28 Mar: London clocks go forward 1h
- 4 Apr: Sydney clocks go back 1h
- 3 Oct: Sydney clocks go forward 1h
- 31 Oct: London clocks go back 1h
Hour-by-hour: London to Sydney
Working hours are 09:00–17:00; night is 23:00–07:00.
| London | Sydney4 Apr – 2 Oct | Sydney1 Jan – 27 Mar, 31 Oct – 31 Dec | Sydney28 Mar – 3 Apr, 3 Oct – 30 Oct |
|---|---|---|---|
| 00:00 | 09:00 | 11:00 | 10:00 |
| 01:00 | 10:00 | 12:00 | 11:00 |
| 02:00 | 11:00 | 13:00 | 12:00 |
| 03:00 | 12:00 | 14:00 | 13:00 |
| 04:00 | 13:00 | 15:00 | 14:00 |
| 05:00 | 14:00 | 16:00 | 15:00 |
| 06:00 | 15:00 | 17:00 | 16:00 |
| 07:00 | 16:00 | 18:00 | 17:00 |
| 08:00 | 17:00 | 19:00 | 18:00 |
| 09:00 | 18:00 | 20:00 | 19:00 |
| 10:00 | 19:00 | 21:00 | 20:00 |
| 11:00 | 20:00 | 22:00 | 21:00 |
| 12:00 | 21:00 | 23:00 | 22:00 |
| 13:00 | 22:00 | 00:00 (next day) | 23:00 |
| 14:00 | 23:00 | 01:00 (next day) | 00:00 (next day) |
| 15:00 | 00:00 (next day) | 02:00 (next day) | 01:00 (next day) |
| 16:00 | 01:00 (next day) | 03:00 (next day) | 02:00 (next day) |
| 17:00 | 02:00 (next day) | 04:00 (next day) | 03:00 (next day) |
| 18:00 | 03:00 (next day) | 05:00 (next day) | 04:00 (next day) |
| 19:00 | 04:00 (next day) | 06:00 (next day) | 05:00 (next day) |
| 20:00 | 05:00 (next day) | 07:00 (next day) | 06:00 (next day) |
| 21:00 | 06:00 (next day) | 08:00 (next day) | 07:00 (next day) |
| 22:00 | 07:00 (next day) | 09:00 (next day) | 08:00 (next day) |
| 23:00 | 08:00 (next day) | 10:00 (next day) | 09:00 (next day) |
Tips for UK and Australia (Sydney) teams
- Both places use daylight saving time but switch on different dates, so for 183 days in 2027 the gap differs from usual. Double-check meetings booked in those weeks.
- With no shared standard hours, agree which side stretches its day, and rotate the inconvenient slot so it doesn't always fall on the same people.
- Keep live meetings for decisions that need discussion; use written handoffs at the end of each day for everything else.
Based on 09:00–17:00 working days in London and Sydney, using 2027 clock-change dates. Real schedules vary, so confirm with your team.