World Timezones

GMT to AEST Converter

Compare AEST to GMT instead

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Offset

9 hours

Greenwich Mean Time (GMT) is currently behind Australian Eastern Time (AEST).

GMT: UTC+1

AEST: UTC+10

Greenwich Mean Time is currently observing daylight saving time; Australian Eastern Time is not.

When to schedule

Standard business hours (9 AM–5 PM, Mon–Fri) in Greenwich Mean Time and Australian Eastern Time don't overlap on the same weekday. Australian Eastern Time is 9 hours ahead of Greenwich Mean Time.

Realistic options: hand off asynchronously, or stretch one side by an hour to catch the other team at the start or end of their day.

This window may shift by an hour during daylight saving time.

About these zones

Greenwich Mean Time is also known as GMT, or BST.

Australian Eastern Time is also known as AEST, or AEDT.

Greenwich Mean Time and Australian Eastern Time are approximately 10,550 miles apart.

Quick reference

Full 24-hour conversion table.

GMTAESTDay
12:00 am9:00 amSame day
1:00 am10:00 amSame day
2:00 am11:00 amSame day
3:00 am12:00 pmSame day
4:00 am1:00 pmSame day
5:00 am2:00 pmSame day
6:00 am3:00 pmSame day
7:00 am4:00 pmSame day
8:00 am5:00 pmSame day
9:00 am6:00 pmSame day
10:00 am7:00 pmSame day
11:00 am8:00 pmSame day
12:00 pm9:00 pmSame day
1:00 pm10:00 pmSame day
2:00 pm11:00 pmSame day
3:00 pm12:00 am+1 day
4:00 pm1:00 am+1 day
5:00 pm2:00 am+1 day
6:00 pm3:00 am+1 day
7:00 pm4:00 am+1 day
8:00 pm5:00 am+1 day
9:00 pm6:00 am+1 day
10:00 pm7:00 am+1 day
11:00 pm8:00 am+1 day

Daylight saving time

Both zones observe daylight saving time, but they transition on different dates.

Greenwich Mean Time: next transition on Sunday, October 25, 2026.

Australian Eastern Time: next transition on Sunday, October 4, 2026.

For approximately 21 days between transitions, the offset between Greenwich Mean Time and Australian Eastern Time differs from its typical value. Recurring meetings during this window will shift by one hour.

Daylight today

Greenwich Mean Time
Sunrise
4:55 AM
Sunset
9:02 PM
Day length
16h 8m
Australian Eastern Time
Sunrise
6:49 AM
Sunset
4:57 PM
Day length
10h 8m

Daylight overlap: 3h 3m — 4:55 AM–7:57 AM in Greenwich Mean Time (1:55 PM–4:57 PM in Australian Eastern Time). Both locations are in daylight during this window.

Cities in these zones

Cities in Australian Eastern Time

Airports in these zones

Airports in Greenwich Mean Time

  • LCY
  • LGW
  • LHR
  • LTN
  • STN
  • BHX
  • EMA
  • GLA
  • PIK
  • LBA

Airports in Australian Eastern Time

  • SYD
  • CBR

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