London & Sydney Time Difference
🕐 Live Timezone Overlap: London & Sydney
London and Sydney sit 9 hours apart, with Sydney ahead. That gap alone rules out a conventional overlap: when London opens at 9am, Sydney is already at 6pm, the edge of its working day. Any call requires one team to concede comfort, either an early London morning or a late Sydney evening. Knowing exactly where the boundary falls each season is the practical starting point for anyone scheduling between the United Kingdom and Australia.
Time Difference: London and Sydney
Sydney is currently 9 hours ahead of London. The live offsets are London UTC+1 and Sydney UTC+10. London observes daylight saving and Sydney also observes daylight saving, so the offset shifts twice a year if both sides aren't already aligned.
Sydney runs UTC+10 (AEST) for most of the year, shifting to UTC+11 (AEDT) during southern-hemisphere summer, from the first Sunday in October to the first Sunday in April. London currently observes UTC+1 (BST) under British Summer Time. Both cities observe DST, but their changeover weekends fall in opposite seasons. This means the gap between London and Sydney fluctuates: when Sydney is on AEDT (UTC+11) and London is on GMT (UTC+0), the difference widens to 11 hours; when London is on BST (UTC+1) and Sydney is on AEST (UTC+10), it narrows to 9 hours.
Best Times to Meet
There is no in-hours overlap between London and Sydney. With a 9-hour gap at its narrowest, 9am in London is 6pm in Sydney, and standard working hours (9am to 6pm) do not intersect at all. Bridging the two cities means working outside normal hours for at least one party. London finance teams, who commonly hold informal meetings between 5pm and 6pm, may find a 6pm London slot (3am Sydney next day) impractical. A 7am to 8am London call, outside standard hours, corresponds to 4pm to 5pm in Sydney, the most workable compromise.
Working Hours Overlap Explained
London operates on Europe/London (currently UTC+1). Sydney operates on Australia/Sydney (currently UTC+10). The table below maps a standard 9:00 AM–6:00 PM day in London to Sydney's local time.
| London time | Sydney time | Status |
|---|---|---|
| 9:00 AM | 6:00 PM | Sydney wrapping up |
| 10:00 AM | 7:00 PM | Sydney outside hours |
| 11:00 AM | 8:00 PM | Sydney outside hours |
| 12:00 PM | 9:00 PM | Sydney outside hours |
| 1:00 PM | 10:00 PM | Sydney outside hours |
| 2:00 PM | 11:00 PM | Sydney outside hours |
| 3:00 PM | 12:00 AM | Sydney outside hours |
| 4:00 PM | 1:00 AM | Sydney outside hours |
| 5:00 PM | 2:00 AM | Sydney outside hours |
| 6:00 PM | 3:00 AM | Sydney outside hours |
Tips for Scheduling Across London and Sydney
- A 7am to 8am London call lands at 4pm to 5pm in Sydney, the only near-comfortable slot for both sides.
- Sydney shifts to AEDT in October, widening the gap to 11 hours. Update recurring invites before that changeover.
- Sydney offices run on reduced staff from Christmas through Australia Day on 26 January. Avoid scheduling calls in that window.
- London Fridays often wind down by 4pm. Book cross-city calls no later than Thursday for a reliable London audience.
- Confirm whether Sydney is on AEST or AEDT before sending a calendar invite: the difference is a full hour either way.
Public Holidays and Working Weeks
Both cities follow a Monday to Friday working week. In London, most office workers wind down by 5:30pm, and Fridays often end earlier still. Sydney offices run on skeleton staff between Christmas and Australia Day on 26 January, making late December and early January a poor time for cross-city planning. London's next notable public holidays include the May Bank Holiday and Christmas Day on 25 December. Cross-city meetings should account for both the UK and Australian calendars to avoid scheduling into unannounced gaps.