AEST to GMT
On Oct 23, 2026, UK time is 10 hours behind Australian Eastern Time: 9:00 AM AEDT is 11:00 PM BST the previous day. The gap changes during the year because of daylight saving time; the dates are below.
GMT vs AEST over the next 12 months
| Period | GMT is | Example |
|---|---|---|
| Oct 23, 2026 to Oct 25, 2026 | 10 hours behind | 9:00 AM AEDT = 11:00 PM BST (previous day) |
| Oct 25, 2026 to Mar 28, 2027 | 11 hours behind | 9:00 AM AEDT = 10:00 PM GMT (previous day) |
| Mar 28, 2027 to Apr 4, 2027 | 10 hours behind | 9:00 AM AEDT = 11:00 PM BST (previous day) |
| Apr 4, 2027 to Oct 3, 2027 | 9 hours behind | 9:00 AM AEST = 12:00 AM BST |
| Oct 3, 2027 onwards | 10 hours behind | 9:00 AM AEDT = 11:00 PM BST (previous day) |
AEST to GMT conversion table
Every hour of a weekday around Oct 23, 2026, in both zones.
| Australian Eastern Time | UK time |
|---|---|
| 12:00 AM | 1:00 PM (previous day) |
| 1:00 AM | 2:00 PM (previous day) |
| 2:00 AM | 3:00 PM (previous day) |
| 3:00 AM | 4:00 PM (previous day) |
| 4:00 AM | 5:00 PM (previous day) |
| 5:00 AM | 6:00 PM (previous day) |
| 6:00 AM | 7:00 PM (previous day) |
| 7:00 AM | 8:00 PM (previous day) |
| 8:00 AM | 9:00 PM (previous day) |
| 9:00 AM | 10:00 PM (previous day) |
| 10:00 AM | 11:00 PM (previous day) |
| 11:00 AM | 12:00 AM |
| 12:00 PM | 1:00 AM |
| 1:00 PM | 2:00 AM |
| 2:00 PM | 3:00 AM |
| 3:00 PM | 4:00 AM |
| 4:00 PM | 5:00 AM |
| 5:00 PM | 6:00 AM |
| 6:00 PM | 7:00 AM |
| 7:00 PM | 8:00 AM |
| 8:00 PM | 9:00 AM |
| 9:00 PM | 10:00 AM |
| 10:00 PM | 11:00 AM |
| 11:00 PM | 12:00 PM |
Best time for a meeting
There is no 9-to-5 overlap; within an 8 AM–8 PM day the zones overlap for 1 hour on a weekday: 7:00 PM–8:00 PM AEDT, which is 8:00 AM–9:00 AM GMT.
Comparing more than two places? The meeting planner lines up working hours for up to six cities.
Daylight saving time
Australian Eastern Time (AEST/AEDT)
- Apr 4, 2027: clocks go back 1 hour at 3:00 AM (UTC+11 → UTC+10)
- Oct 3, 2027: clocks go forward 1 hour at 2:00 AM (UTC+10 → UTC+11)
UK time (GMT/BST)
- Oct 25, 2026: clocks go back 1 hour at 2:00 AM (UTC+1 → UTC±0)
- Mar 28, 2027: clocks go forward 1 hour at 1:00 AM (UTC±0 → UTC+1)
Where these clocks are used
- Australian Eastern Time (AEST/AEDT): Sydney, Melbourne, Canberra (Brisbane stays on AEST all year). IANA zone
Australia/Sydney. - UK time (GMT/BST): London, Edinburgh, Dublin and Lisbon keep the same clock. IANA zone
Europe/London.
Questions
What time is it in GMT when it is 9 AM AEST?
On Oct 23, 2026, 9:00 AM AEDT is 11:00 PM BST the previous day. On other dates the answer can shift by an hour because of daylight saving time; the table of periods on this page gives each one.
How many hours behind AEST is GMT?
It depends on the date. Oct 23, 2026 to Oct 25, 2026: GMT is 10 hours behind. Oct 25, 2026 to Mar 28, 2027: GMT is 11 hours behind. Mar 28, 2027 to Apr 4, 2027: GMT is 10 hours behind. Apr 4, 2027 to Oct 3, 2027: GMT is 9 hours behind. Oct 3, 2027 onwards: GMT is 10 hours behind.
Do AEST and GMT observe daylight saving time?
Australian Eastern Time switches to AEDT (UTC+11) in summer and back to AEST (UTC+10) in winter. UK time switches to BST (UTC+1) in summer and back to GMT (UTC±0) in winter.
What is the best time for a meeting between AEST and GMT?
There is no 9-to-5 overlap; within an 8 AM–8 PM day the zones overlap for 1 hour on a weekday: 7:00 PM–8:00 PM AEDT, which is 8:00 AM–9:00 AM GMT.
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Related conversions
- GMT to AEST (reverse)
- EST to GMT
- CST to GMT
- MST to GMT
- PST to GMT
- UTC to GMT
- CET to GMT
- IST to GMT
- SGT to GMT
- JST to GMT
- AEST to EST
- AEST to CST
- All time zones
Computed from the IANA time zone database on Oct 23, 2026. Live clocks and the converter use your browser's copy of the same data.