Convert Australian Central Standard Time to Greenwich Mean Time - Quick & Accurate
Updates live every second
Hover over any hour to see corresponding time in both zones
To schedule a meeting between ACST and GMT:
Pro Tip: Schedule calls during the overlap window for optimal convenience for both time zones
| ACST Time | GMT Time | Context |
|---|---|---|
| 12:00 AM | 01:30 PM | Midnight ACST |
| 01:00 AM | 02:30 PM | Late Night |
| 02:00 AM | 03:30 PM | Late Night |
| 03:00 AM | 04:30 PM | Late Night |
| 04:00 AM | 05:30 PM | Late Night |
| 05:00 AM | 06:30 PM | Late Night |
| 06:00 AM | 07:30 PM | Early Morning ACST |
| 07:00 AM | 08:30 PM | Night Time |
| 08:00 AM | 09:30 PM | Night Time |
| 09:00 AM | 10:30 PM | Work Starts ACST |
| 10:00 AM | 11:30 PM | Night Time |
| 11:00 AM | 12:30 AM | Night Time |
Adelaide
Australia/Adelaide
London
Europe/London
GMT (Greenwich Mean Time) is 10.5 hours behind ACST (Australian Central Standard Time). This means when it's 12:00 PM in Adelaide (ACST), it's 1:30 AM in London (GMT).
The best time to call from ACST to GMT is during overlapping business hours. For ACST callers, schedule between 12:00 PM - 5:00 PM ACST to ensure both parties are within standard business hours.
The time difference may change during daylight saving transitions if one region observes DST while the other doesn't. Australian Central Standard Time (UTC+9:30 (ACST) / UTC+10:30 (ACDT)) and Greenwich Mean Time (UTC+0 (GMT) / UTC+1 (BST)) may have different DST schedules.
ACST includes cities like Adelaide. GMT includes cities like London. Both time zones cover important business and cultural centers.
In 2025, DST in North America starts on March 9 at 2:00 AM and ends on November 2 at 2:00 AM. Other regions may have different DST schedules or not observe DST at all.