Time zone · Oceania
AEST
Australian Eastern Standard Time
Australian Eastern Standard Time (AEST) covers major population centers like Sydney, Melbourne, and Brisbane on Australia’s east coast and Macquarie Island. While most clocks here are set to the same standard time, daylight saving creates a shifting patchwork—some states “spring forward” in summer, making coordination across the region a little tricky.
Thursday, October 15, 2026
Current offset
UTC+10:00
Standard · AEST
Daylight saving
Not active
Year-round standard time
IANA zones
6
4 observe DST, 2 don't
DST offset
UTC+11:00
AEDT · +1h
About AEST
Standard time, with a summer shift.
Australian Eastern Standard Time (AEST) covers major population centers like Sydney, Melbourne, and Brisbane on Australia’s east coast and Macquarie Island. While most clocks here are set to the same standard time, daylight saving creates a shifting patchwork—some states “spring forward” in summer, making coordination across the region a little tricky.
IANA zones · the technical identifiers
The 6 zones that resolve to AEST.
For software, always store the IANA identifier — never the abbreviation alone. The database keeps these zones distinct because their rules can, and historically did, diverge.
Cities across AEST
Local time, city by city.
6 cities
Where AEST is used
One country.
Same offset · UTC+10:00
Other zones at UTC+10:00 right now.
These named zones share AEST's offset today. When daylight saving rules differ, they drift apart for part of the year.
Convert
AEST to the world's clocks.
Frequently asked questions
Common questions about AEST, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- Does AEST observe daylight saving?
- Yes, parts of the AEST region do. States like New South Wales, Victoria, Tasmania, and the Australian Capital Territory observe daylight saving and switch to AEDT (UTC+11) during summer. However, Queensland stays on AEST year‑round.
- Why doesn’t Queensland use daylight saving?
- Queensland has not adopted daylight saving largely because of its tropical climate and strong public opposition to changing clocks. Many residents prefer consistent daylight hours rather than extended evening light in summer.
- What is Macquarie Island’s role in AEST?
- Macquarie Island is a remote sub-Antarctic island that is part of Tasmania. It uses AEST in winter and, like Tasmania, switches to AEDT (UTC+11) in summer.
- How many time‑zone codes are in the AEST region?
- There are six member zones, including cities like Sydney, Melbourne, Brisbane, and Hobart, plus Macquarie Island. Some of these zones share the same offset but differ in their daylight saving behavior.
- When does daylight saving change happen?
- In observant areas, clocks move forward to AEDT on the first Sunday in October and return to AEST on the first Sunday in April. Outside daylight saving zones like Queensland, there’s no change.
- Why do some Australians resist daylight saving?
- Arguments against daylight saving include disrupted routines, health impacts, and energy-use concerns. Tropical regions like Queensland feel less benefit from shifting clocks due to already long summer days.
- How does AEST affect business with other countries?
- Daylight saving widens the gap with Asia: Sydney is 2 hours ahead of Singapore under AEST and 3 hours ahead under AEDT, while Brisbane stays 2 hours ahead all year.
- Do all cities in AEST behave the same year‑round?
- No. Queensland stays on UTC+10 constantly, while others shift between AEST and AEDT. This creates internal time differences within the regional code.
- Is AEST the same as AEDT?
- No. AEST is the standard UTC+10 offset used outside daylight saving. AEDT (UTC+11) is the daylight saving version adopted by several states in the region during summer.
Source: IANA tzdb2026d · Reviewed
Free · Developer API
This time zone, as JSON.
Its defining offset, DST status and member counts, from one endpoint.
Also in the API: time zones by coordinates, conversions that flag daylight saving gaps, and abbreviations decoded.
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