AEDT: Australian Eastern Daylight Time
AEDT is Australian Eastern Daylight Time, +11:00, used in Oceania. In code, use Australia/Sydney rather than the abbreviation.
Australian Eastern Daylight Time · Oceania
11:45:48
Sunday, 27 September 2026
- abbreviation denotes
- +11:00
- in force right now
- AEST (UTC+10:00)
- use in code
- Australia/Sydney
- next clock change
- 4 Oct 2026 03:00 → AEDT
Right now this zone is on AEST, not AEDT. They are the same place at different times of year.
Use the IANA name, not the abbreviation
Python
from datetime import datetime
from zoneinfo import ZoneInfo
# right: an IANA zone carries the full history of rule changes
now = datetime.now(ZoneInfo("Australia/Sydney"))
print(now.isoformat(), now.tzname())
# wrong: an abbreviation is not resolvable, and a hard-coded offset
# silently rots the next time the rules change
# now = datetime.now(timezone(timedelta(hours=...))) # don'tAEDT questions
What does AEDT stand for?
AEDT is Australian Eastern Daylight Time, +11:00, used in Oceania. The IANA zone to use in code is Australia/Sydney.
What time is it in AEDT right now?
Australian Eastern Daylight Time: 11:45 on Sunday (AEST).
Which IANA timezone should I use instead of AEDT?
Australia/Sydney for Australian Eastern Daylight Time. Date libraries cannot resolve bare abbreviations, and an abbreviation carries no daylight-saving history, so a stored offset silently rots when a government changes the rules.
Why does my computer show AEST instead of AEDT?
Because Australia/Sydney is currently on AEST (UTC+10:00), its daylight-saving variant. AEDT (+11:00) applies during the other half of the year. Both names refer to the same place, one hour apart.