AEDT — Australian Eastern Daylight Time
Daylight variant of AEST — UTC+11.
AEDT stands for Australian Eastern Daylight Time. Daylight variant of AEST — UTC+11.
AEDT is UTC+11:00 from Coordinated Universal Time (UTC). The primary IANA zone is Australia/Sydney.
AEDT is a daylight-saving time abbreviation. It is used when clocks are advanced from AEST (UTC+10:00) during summer months.
Standard / daylight pair
AEST · UTC+10 — April–October in Southeastern Australia
Countries using this zone
- Australia
Principal cities
- Sydney
- Melbourne
- Canberra
- Hobart
- Wollongong
- Geelong
History
Daylight saving in Australia was historically inconsistent across states until a major synchronization occurred for the 2000 Sydney Olympics. In 2008, the participating southeastern states and territories officially agreed to align their transition dates to ensure economic and social consistency. Lord Howe Island is unique because it shifts only 30 minutes forward from its standard time of UTC+10:30 to reach the AEDT offset of UTC+11.
Frequently Asked Questions
AEDT — Australian Eastern Daylight Time. Daylight variant of AEST — UTC+11.
AEDT is UTC+11:00. It is paired with AEST (UTC+10:00).
Countries and territories primarily using AEDT include: AU.
AEDT IS the daylight-saving variant. Zones shift from AEST to AEDT at the start of summer and back to AEST at the end.
AEDT is the summer (daylight-saving) abbreviation and AEST is the winter (standard) abbreviation. AEDT is one hour ahead of AEST.
The primary IANA time zone representing AEDT is Australia/Sydney. Operating systems and programming libraries use this identifier to resolve local time.
AEDT stands for Australian Eastern Daylight Time, which is the time zone observed in southeastern Australia during the summer months. It is 11 hours ahead of Coordinated Universal Time (UTC+11). The zone is used to provide more daylight in the evenings by shifting the clock forward 1 hour from standard time.
The primary difference is the UTC offset and the time of year they are used. AEDT is UTC+11 and is active during the summer, while AEST is UTC+10 and is used during the winter. Both apply to the same southeastern Australian regions, with clocks moving forward or back to transition between them.
AEDT is currently observed in New South Wales, Victoria, Tasmania, and the Australian Capital Territory. It also includes the Jervis Bay Territory and Lord Howe Island. Other regions, including Queensland, the Northern Territory, and Western Australia, do not observe daylight saving and therefore never switch to AEDT, remaining on their respective standard times.
Clocks transition to AEDT on the first Sunday of October at 02:00 local time, when they are moved forward to 03:00. The period ends on the first Sunday of April at 03:00 local time, when clocks are moved back to 02:00 to return to Australian Eastern Standard Time (AEST).
Australian Eastern Daylight Time (AEDT) is 11 hours ahead of Coordinated Universal Time (UTC). When compared to major global cities, it is 11 hours ahead of London during their winter and 16 hours ahead of New York City during their standard time. These offsets change when other regions enter their own daylight saving periods.