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.
Saturday, June 6, 2026
Current offset
UTC+10:00
Standard · AEST
Daylight saving
Not active
Returns 4 Oct 2026
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.
DST schedule · AEST · AEDT
2026 Sunday · clocks spring forward
Clocks spring forward by one hour · in 4 months.
Affects 4 of 6 zones — the rest stay on AEST year-round.
One year, two clocks
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 currently on AEST
The same hour, city by city.
6 cities · all UTC+10:00
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.
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 and Macquarie Island stay 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 territory of Australia. It uses AEST but does not observe daylight saving, making it the only member zone in this group that keeps the same UTC+10 offset all year.
- 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?
- When daylight saving is active, eastern Australia aligns more closely with parts of Southeast Asia in working hours. Outside DST, it reverts to UTC+10, which can widen or narrow the gap depending on the partner’s offset.
- Do all cities in AEST behave the same year‑round?
- No. Queensland and Macquarie Island stay 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.
Free · Developer API
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