No overlap — one side will join outside working hours
SYDNEY (Sydney)
GMT (London)
00:00
15:00-1dWorking
01:00
16:00-1dWorking
02:00
17:00-1d
03:00
18:00-1d
04:00
19:00-1d
05:00
20:00-1d
06:00
21:00-1d
07:00
22:00-1d
08:00
23:00-1d
09:00Working
00:00off
10:00Working
01:00off
11:00Working
02:00off
12:00Working
03:00off
13:00Working
04:00off
14:00Working
05:00off
15:00Working
06:00off
16:00Working
07:00off
17:00
08:00
18:00
09:00Working
19:00
10:00Working
20:00
11:00Working
21:00
12:00Working
22:00
13:00Working
23:00
14:00Working
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between sydney and gmt?
SYDNEY (Sydney) (sydney) is UTC+10 and Greenwich Mean Time (gmt) is UTC+1. The difference between them is 9 hours.
Where is sydney used?
SYDNEY (Sydney) (sydney) is used in Australia and surrounding regions. The IANA timezone identifier is Australia/Sydney.
Where is gmt used?
Greenwich Mean Time (gmt) is used in United Kingdom and surrounding regions. The IANA timezone identifier is Europe/London.
How do I convert sydney to gmt?
Use the interactive converter above. Drag the time slider to any sydney time and the gmt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
Sydney is 9 hours ahead of GMT (London). Midday in Sydney lines up with 03:00 in GMT (London).
Sydney runs on Australia/Sydney; GMT (London) runs on Europe/London. Together they are 9 hours apart.
Shared working hours
There is no business hours overlap between Sydney and GMT (London) during standard working hours (9:00–17:00). Meetings would require one party to work outside normal hours.
Best times to schedule a meeting
Sydney and GMT (London) have no shared working window. These slots minimize out-of-hours disruption for both sides.
16:00 Sydney / 07:00 London⚡ One side off-hours
⚠️ 2h before working hours in London
18:00 Sydney / 09:00 London⚡ One side off-hours
⚠️ 2h after working hours in Sydney
15:00 Sydney / 06:00 London⚡ One side off-hours
⚠️ 3h before working hours in London
Working hours defined as 09:00–17:00 local time for each location.
Upcoming public holidays
⚡ Watch out — upcoming holidays on both sides. Verify availability in advance.
Sydney7 holidays
Aug 3Picnic Day
Sep 28King's Birthday
Oct 5Labour Day
Oct 5King's Birthday
Nov 3Melbourne Cup
GMT (London)6 holidays
Jul 13Battle of the Boyne
Aug 3Summer Bank Holiday
Aug 31Summer Bank Holiday
Nov 30Saint Andrew's Day
Dec 25Christmas Day
How to work with Sydney and GMT (London) time zones
A 9-hour difference separates Sydney (Australia) and GMT (London) (United Kingdom) — wide enough that standard business hours don't align at all. Scheduling requires deliberate compromise from both sides.
💡 How to schedule across these time zones
⚡
A 16:00 meeting in Sydney means 07:00 in GMT (London) (2h before working hours in London).
⚡
A 18:00 meeting in Sydney means 09:00 in GMT (London) (2h after working hours in Sydney).
⚡
A 15:00 meeting in Sydney means 06:00 in GMT (London) (3h before working hours in London).
Since there is no natural overlap, the options above represent the most balanced compromise, minimizing out-of-hours inconvenience for both sides.
Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.
Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am Sydney".
