9am in Sydney is 12am in London
MEETING PLANNER
hover a column · click to lockSydney is 9 hours ahead of London. London runs on Europe/London (UTC+1); Sydney runs on Australia/Sydney (UTC+10). The difference is measured right now; it can shift by one hour during daylight-saving-time transitions.
Both London and Sydney observe daylight saving time, but their transition dates are not identical. London shifts between GMT (UTC+0) and BST (UTC+1); Sydney shifts between AEST (UTC+10) and AEDT (UTC+11). The difference between them stays close to 10 hours across most of the year, with short mismatch windows around each city’s transition when the gap briefly widens or narrows by an hour.
Standard 9-to-5 business hours in London and Sydney do not overlap. Teams operating across this pair either stretch their schedules — an early-morning call from the westward city lands as an evening call in the eastward one — or rely fully on asynchronous tools. Scheduled windows at the edges (first thing for one side, last thing for the other) are the usual compromise, with one side absorbing the unsocial-hours cost this week and the other side next week.
When planning recurring meetings across London and Sydney, pin them to one city’s local time rather than UTC or the other city’s clock. That way, the meeting time stays stable for the person anchoring the schedule, and the other side absorbs the one-hour drift during DST transitions. The alternative — a meeting pinned to the non-DST city — means the DST city sees the meeting time “move” twice a year, which is how recurring calendar invites end up at 7am on someone’s calendar in October.
- What is the time difference between London and Sydney?
- Sydney is currently 9 hours ahead of London. London is on Europe/London (UTC+1); Sydney is on Australia/Sydney (UTC+10). The offset shifts by one hour during daylight-saving transitions — the difference is 10 hours in winter and 10 hours in summer.
- Do London and Sydney observe daylight saving time?
- Both cities observe daylight saving time. London uses GMT in winter and BST in summer; Sydney uses AEST in winter and AEDT in summer. Their transition dates can differ by a week or two, which briefly widens or narrows the offset during the changeover period.
- When do business hours overlap between London and Sydney?
- Standard 9-to-5 business hours do not overlap. Real-time calls require at least one side to work outside normal hours; most teams default to async or schedule edge-of-day windows.
Frequently Asked Questions
What is the time difference between London and Sydney?
Sydney is currently 9 hours ahead of London. London is on Europe/London (UTC+1); Sydney is on Australia/Sydney (UTC+10). The offset shifts by one hour during daylight-saving transitions — the difference is 10 hours in winter and 10 hours in summer.
Do London and Sydney observe daylight saving time?
Both cities observe daylight saving time. London uses GMT in winter and BST in summer; Sydney uses AEST in winter and AEDT in summer. Their transition dates can differ by a week or two, which briefly widens or narrows the offset during the changeover period.
When do business hours overlap between London and Sydney?
Standard 9-to-5 business hours do not overlap. Real-time calls require at least one side to work outside normal hours; most teams default to async or schedule edge-of-day windows.