London is currently 9 hours behind Sydney. Convert time between London and Sydney, see the exact difference, and find the best hours for calls and meetings.
London uses British Summer Time. Sydney uses Australian Eastern Standard Time. London time is 9 hours behind Sydney. So, when it is 12:00 AM in London, it is 9:00 AM in Sydney.
Common London times and their Sydney equivalents.
| London Time | Sydney Time |
|---|---|
| 12:00 AM London | 9:00 AM Sydney |
| 1:00 AM London | 10:00 AM Sydney |
| 2:00 AM London | 11:00 AM Sydney |
| 3:00 AM London | 12:00 PM Sydney |
| 4:00 AM London | 1:00 PM Sydney |
| 5:00 AM London | 2:00 PM Sydney |
| 6:00 AM London | 3:00 PM Sydney |
| 7:00 AM London | 4:00 PM Sydney |
| 8:00 AM London | 5:00 PM Sydney |
| 9:00 AM London | 6:00 PM Sydney |
| 10:00 AM London | 7:00 PM Sydney |
| 11:00 AM London | 8:00 PM Sydney |
| 12:00 PM London | 9:00 PM Sydney |
| 1:00 PM London | 10:00 PM Sydney |
| 2:00 PM London | 11:00 PM Sydney |
| 3:00 PM London | 12:00 AM Sydney |
| 4:00 PM London | 1:00 AM Sydney |
| 5:00 PM London | 2:00 AM Sydney |
| 6:00 PM London | 3:00 AM Sydney |
| 7:00 PM London | 4:00 AM Sydney |
| 8:00 PM London | 5:00 AM Sydney |
| 9:00 PM London | 6:00 AM Sydney |
| 10:00 PM London | 7:00 AM Sydney |
| 11:00 PM London | 8:00 AM Sydney |
London uses Greenwich Mean Time (GMT, UTC+0) in winter and British Summer Time (BST, UTC+1) in summer. The UK clocks go forward one hour on the last Sunday of March and back on the last Sunday of October. GMT takes its name from the Royal Observatory in Greenwich, east London — the historical origin of UTC-based world time.
Sydney uses Australian Eastern Standard Time (AEST, UTC+10) in winter and Australian Eastern Daylight Time (AEDT, UTC+11) in summer. Because Australia is in the Southern Hemisphere, its summer runs October–April — the opposite of the Northern Hemisphere. Clocks go forward on the first Sunday of October and back on the first Sunday of April.
Both London and Sydney may observe Daylight Saving Time, which means the offset between them can change twice a year. Here is what to expect each season.
| Period | Note | London | Sydney | Offset |
|---|---|---|---|---|
| Nov – Mar | Both on standard time | GMT (UTC+0) | GMT+11 (UTC+11) | 11 hours |
| Mar – late Mar | US clocks forward, some zones still on standard | GMT (UTC+0) | GMT+11 (UTC+11) | 11 hours |
| Late Mar – Oct current | Both on summer / daylight time | GMT+1 (UTC+1) | GMT+10 (UTC+10) | 9 hours |
| Late Oct – early Nov | Clocks transitioning — check exact date | GMT (UTC+0) | GMT+11 (UTC+11) | 11 hours |
The transition window typically lasts 1–2 weeks in spring and autumn. If you have a recurring weekly meeting near a clock change, verify the exact date to avoid a missed call.
London is currently 9 hours behind Sydney. London uses British Summer Time (UTC+1) and Sydney uses Australian Eastern Standard Time (UTC+10).
London and Sydney have no standard 9 am–6 pm business-hour overlap. Consider scheduling during early morning or late evening, or use a rotating schedule to share the inconvenience.
When it is 9:00 AM in London, it is 6:00 pm in Sydney. London is 9 hours behind Sydney.
When it is 5:00 PM in Sydney, it is 8:00 am in London.
Both London and Sydney observe Daylight Saving Time, but their transitions may not happen on the same date. During the brief 1–2 week windows in spring and autumn when only one zone has changed clocks, the offset between the two cities shifts by one hour. For most of the year the difference is 9 hours, but double-check the transition dates if you have a recurring meeting scheduled near those windows.