London is 11 hours behind Sydney from 25 Oct 2026 until 28 Mar 2027.
Next change: On Sun 28 Mar 2027, the UK starts daylight saving time and the gap becomes 10 hours.
Your device's time zone data looks out of date for one of these cities, so its own clock may disagree. The times on this page use the 2026e rules.
Best time to call
The table below uses the 11-hour gap until 28 Mar 2027; it updates to today’s gap in your browser.
Good window: 7 pm–9 pm in Sydney = 8 am–10 am in London.
Work-hours overlap with the current 11-hour gap: none, the working days do not overlap.
| Sydney | London | Both 8 am–9 pm |
|---|---|---|
| 00:00 | 13:00 (prev. day) | |
| 01:00 | 14:00 (prev. day) | |
| 02:00 | 15:00 (prev. day) | |
| 03:00 | 16:00 (prev. day) | |
| 04:00 | 17:00 (prev. day) | |
| 05:00 | 18:00 (prev. day) | |
| 06:00 | 19:00 (prev. day) | |
| 07:00 | 20:00 (prev. day) | |
| 08:00 | 21:00 (prev. day) | |
| 09:00 | 22:00 (prev. day) | |
| 10:00 | 23:00 (prev. day) | |
| 11:00 | 00:00 | |
| 12:00 | 01:00 | |
| 13:00 | 02:00 | |
| 14:00 | 03:00 | |
| 15:00 | 04:00 | |
| 16:00 | 05:00 | |
| 17:00 | 06:00 | |
| 18:00 | 07:00 | |
| 19:00 | 08:00 | ✓ |
| 20:00 | 09:00 | ✓ |
| 21:00 | 10:00 | |
| 22:00 | 11:00 | |
| 23:00 | 12:00 |
Year at a glance
| From (Sydney date) | Until | London vs Sydney |
|---|---|---|
| Sun 25 Oct 2026 | Sun 28 Mar 2027 | 11 hours behind |
| Sun 28 Mar 2027 | Sun 4 Apr 2027 | 10 hours behind |
| Sun 4 Apr 2027 | Sun 3 Oct 2027 | 9 hours behind |
| Sun 3 Oct 2027 | Sun 31 Oct 2027 | 10 hours behind |
| Sun 31 Oct 2027 | … | 11 hours behind |
- Sun 28 Mar 2027: The UK starts daylight saving; London becomes 10 hours behind Sydney.
- Sun 4 Apr 2027: New South Wales ends daylight saving; London becomes 9 hours behind Sydney.
- Sun 3 Oct 2027: New South Wales starts daylight saving; London becomes 10 hours behind Sydney.
- Sun 31 Oct 2027: The UK ends daylight saving; London becomes 11 hours behind Sydney.
Quick answers
Is London ahead or behind Sydney?
London is 11 hours behind Sydney from 25 Oct 2026 until 28 Mar 2027. On Sun 28 Mar 2027, the UK starts daylight saving time and the gap becomes 10 hours. Over the next 12 months it varies between 9 and 11 hours, depending on daylight saving. (IANA tz database 2026e.) Your browser shows today’s value on this page.
Does the time difference change during the year?
Yes, from Sun 25 Oct 2026 it is 11 hours; from Sun 28 Mar 2027 it is 10 hours; from Sun 4 Apr 2027 it is 9 hours; from Sun 3 Oct 2027 it is 10 hours; from Sun 31 Oct 2027 it is 11 hours. Both cities follow their own daylight saving rules (IANA tz database 2026e).
When is the best time to call London from Sydney?
With the current 11-hour gap until 28 Mar 2027 and both sides between 8 am and 9 pm local time: 7 pm–9 pm in Sydney = 8 am–10 am in London. When the gap changes, the live table on this page adjusts.
Related
Other time differences from Sydney: Sydney and Los Angeles · Sydney and New York
Sources
Time zone rules: IANA tz database 2026e (zones Australia/Sydney and Europe/London). Last checked 18 Oct 2026. Daylight saving rules can change; we re-check them regularly.