No overlap — one side will join outside working hours
GMT (London)
SYDNEY (Sydney)
00:00
09:00Working
01:00
10:00Working
02:00
11:00Working
03:00
12:00Working
04:00
13:00Working
05:00
14:00Working
06:00
15:00Working
07:00
16:00Working
08:00
17:00
09:00Working
18:00off
10:00Working
19:00off
11:00Working
20:00off
12:00Working
21:00off
13:00Working
22:00off
14:00Working
23:00off
15:00Working
00:00+1doff
16:00Working
01:00+1doff
17:00
02:00+1d
18:00
03:00+1d
19:00
04:00+1d
20:00
05:00+1d
21:00
06:00+1d
22:00
07:00+1d
23:00
08:00+1d
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between gmt and sydney?
Greenwich Mean Time (gmt) is UTC+1 and SYDNEY (Sydney) (sydney) is UTC+10. The difference between them is 9 hours.
Where is gmt used?
Greenwich Mean Time (gmt) is used in United Kingdom and surrounding regions. The IANA timezone identifier is Europe/London.
Where is sydney used?
SYDNEY (Sydney) (sydney) is used in Australia and surrounding regions. The IANA timezone identifier is Australia/Sydney.
How do I convert gmt to sydney?
Use the interactive converter above. Drag the time slider to any gmt time and the sydney equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
GMT (London) is 9 hours behind Sydney. When GMT (London) clocks hit noon, Sydney reads 21:00.
GMT (London) observes Europe/London and Sydney observes Australia/Sydney — a 9 hours gap between them.
Shared working hours
When GMT (London) is in standard working hours, Sydney is not — and vice versa. There is no mutual business window between these two locations.
Optimal meeting slots
No business hours overlap exists between GMT (London) and Sydney. Showing the most balanced options with minimal inconvenience for both locations.
07:00 London / 16:00 Sydney⚡ One side off-hours
⚠️ 2h before working hours in London
09:00 London / 18:00 Sydney⚡ One side off-hours
⚠️ 2h after working hours in Sydney
06:00 London / 15:00 Sydney⚡ One side off-hours
⚠️ 3h before working hours in London
Assumes a standard 9 AM–5 PM workday in each location's local timezone.
Holiday calendar for both locations
⚡ Both locations have upcoming holidays, check availability before scheduling.
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
Sydney7 holidays
Aug 3Picnic Day
Sep 28King's Birthday
Oct 5Labour Day
Oct 5King's Birthday
Nov 3Melbourne Cup
Working across GMT (London) and Sydney
A 9-hour difference separates GMT (London) (United Kingdom) and Sydney (Australia) — wide enough that standard business hours don't align at all. Scheduling requires deliberate compromise from both sides.
💡 Best practice for cross-timezone meetings
⚡
07:00–08:00 in GMT (London) corresponds to 16:00–17:00 in Sydney (2h before working hours in London).
⚡
09:00–10:00 in GMT (London) corresponds to 18:00–19:00 in Sydney (2h after working hours in Sydney).
⚡
06:00–07:00 in GMT (London) corresponds to 15:00–16:00 in Sydney (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.
Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.
Drag the slider at the top to convert any GMT (London) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.
