GMT to AEDT Converter & Meeting Planner
Quick answer: 9:00 AM GMT = 8:00 PM AEDT (fixed +00:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Greenwich Mean Time (GMT) and Australian Eastern Daylight Time (AEDT)? You need to account for the standard time difference. Australian Eastern Daylight Time is normally 11 hours ahead of Greenwich Mean Time. Whether you are coordinating between teams in London and Dublin and Sydney and Melbourne, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM GMT = 11:00 AM AEDT. The full 24-hour GMT to AEDT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM GMT = 2:00 AM AEDT (+1 day).
| GMT Time | AEDT Time |
|---|---|
| 12:00 AM (00:00) | 11:00 AM (11:00) |
| 1:00 AM (01:00) | 12:00 PM (12:00) |
| 2:00 AM (02:00) | 1:00 PM (13:00) |
| 3:00 AM (03:00) | 2:00 PM (14:00) |
| 4:00 AM (04:00) | 3:00 PM (15:00) |
| 5:00 AM (05:00) | 4:00 PM (16:00) |
| 6:00 AM (06:00) | 5:00 PM (17:00) |
| 7:00 AM (07:00) | 6:00 PM (18:00) |
| 8:00 AM (08:00) | 7:00 PM (19:00) |
| 9:00 AM (09:00) | 8:00 PM (20:00) |
| 10:00 AM (10:00) | 9:00 PM (21:00) |
| 11:00 AM (11:00) | 10:00 PM (22:00) |
| 12:00 PM (12:00) | 11:00 PM (23:00) |
| 1:00 PM (13:00) | 12:00 AM (00:00)+1 day |
| 2:00 PM (14:00) | 1:00 AM (01:00)+1 day |
| 3:00 PM (15:00) | 2:00 AM (02:00)+1 day |
| 4:00 PM (16:00) | 3:00 AM (03:00)+1 day |
| 5:00 PM (17:00) | 4:00 AM (04:00)+1 day |
| 6:00 PM (18:00) | 5:00 AM (05:00)+1 day |
| 7:00 PM (19:00) | 6:00 AM (06:00)+1 day |
| 8:00 PM (20:00) | 7:00 AM (07:00)+1 day |
| 9:00 PM (21:00) | 8:00 AM (08:00)+1 day |
| 10:00 PM (22:00) | 9:00 AM (09:00)+1 day |
| 11:00 PM (23:00) | 10:00 AM (10:00)+1 day |
Best time to call Sydney from London
For most work calls, compare the normal business day in London (GMT) with the business day in Sydney (AEDT). GMT commonly covers Europe, Africa, while AEDT is mainly associated with Oceania, Eastern Australia.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
⚠️ There is no clean same-day business-hours overlap on 2026-07-05. A practical compromise is around 12:00 AM GMT, which reaches 9:00 AM AEDT near the start of their workday.
- DST Safety: GMT or AEDT may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- London Stock Exchange: 08:00-16:30 local time in London.
- Australian Securities Exchange (ASX): 10:00-16:00 local time in Sydney.
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Frequently Asked Questions
What is the time difference between GMT and AEDT?
During standard time, Australian Eastern Daylight Time is 11 hours ahead of Greenwich Mean Time.
What is the difference between GMT and BST?
GMT (Greenwich Mean Time) is the UK's standard winter offset at UTC+0, observed from the last Sunday in October through the last Sunday in March. BST (British Summer Time) is the daylight saving offset at UTC+1, applied each summer when clocks advance one hour.
Is GMT the same as UTC?
GMT and UTC share exactly the same numerical offset — both represent UTC+00:00 — but they are fundamentally different in nature. UTC is an atomic-clock-based international time standard used as the global reference, while GMT is a geographic time zone legally observed by specific countries including the United Kingdom and Ireland during winter months.
When does AEDT start and end?
AEDT begins on the first Sunday in October at 02:00 local time, when clocks spring forward one hour from AEST (UTC+10) to AEDT (UTC+11). It ends on the first Sunday in April at 03:00 local time, when clocks fall back to AEST. In 2026, AEDT starts on October 4 and ends on April 5 — following the Southern Hemisphere summer calendar, which runs opposite to DST schedules in Europe and North America.
Is Brisbane on AEDT?
No — Queensland, including Brisbane, does not observe Daylight Saving Time and remains on AEST (UTC+10) year-round. During the AEDT period from October through April, Sydney and Melbourne advance to UTC+11 while Brisbane stays at UTC+10, creating a one-hour gap between cities that share nearly the same longitude and are otherwise in the same time zone for the other six months of the year.