AEST and AEDT — Australian Eastern Standard Time and Australian Eastern Daylight Time
AEST (Australian Eastern Standard Time) means UTC+10:00 and AEDT (Australian Eastern Daylight Time) means UTC+11:00: Sydney keeps AEST in winter and AEDT in summer.
Current time in AEST
01:22:15
Australian Eastern Standard Time · UTC+10:00
Current time in AEDT
02:22:15
Australian Eastern Daylight Time · UTC+11:00
About AEST and AEDT
New South Wales and Victoria switch to AEDT (UTC+11) in the southern summer, while Queensland stays on AEST all year.
Working with AEST and AEDT
No other label in this directory uses UTC+10:00 or UTC+11:00. One hour to the west of AEST in this directory sits JST (UTC+09:00); no listed zone keeps the offset one hour to the east.
Clock changes in AEST and AEDT
Sydney is a southern-hemisphere zone, so its summer time runs across the new year: clocks go forward in October and back in April.
| Date | Change | New offset |
|---|---|---|
| April 4, 2027 | Clocks go back one hour on Apr 4, 2027 at 03:00, moving from UTC+11:00 to UTC+10:00. | UTC+10:00 |
| October 3, 2027 | Clocks go forward one hour on Oct 3, 2027 at 02:00, moving from UTC+10:00 to UTC+11:00. | UTC+11:00 |
Clock history of Australia/Sydney
| Period | Clocks set to | Seasonal changes |
|---|---|---|
| since 1900 | UTC+10:00 | 60 years with a change, 1917–2026 |
Who keeps UTC+10:00 and UTC+11:00
Moving between UTC+10:00 and UTC+11:00 through the year: Sydney and Melbourne.
Countries and territories whose clocks move between UTC+10:00 and UTC+11:00: parts of Australia.
UTC+10:00
All year: Brisbane.
Countries and territories that keep UTC+10:00 all year, from every entry in the tz database: parts of Australia, Guam, parts of Micronesia, Northern Mariana Islands, parts of Papua New Guinea and parts of Russia. Where it is kept all year, UTC+10:00 also goes by these names in the tz database: Chamorro Standard Time, Chuuk Time, Papua New Guinea Time and Vladivostok Standard Time.
UTC+11:00
No city in this directory keeps UTC+11:00 all year.
Countries and territories that keep UTC+11:00 all year, from every entry in the tz database: parts of Micronesia, New Caledonia, parts of Papua New Guinea, parts of Russia, Solomon Islands and Vanuatu. Also on UTC+11:00 for part of the year: parts of Australia and Norfolk Island. Where it is kept all year, UTC+11:00 also goes by these names in the tz database: Kosrae Time, Magadan Standard Time, New Caledonia Standard Time, Pohnpei Time, Solomon Islands Time and Vanuatu Standard Time.
Which of AEST and AEDT applies today
Australia/Sydney is on AEDT (UTC+11:00) at the moment. On April 4, 2027, 152 days from the day this page was generated, its clocks move to AEST (UTC+10:00).
A working day on AEST and AEDT
| Place | AEST’s 09:00–17:00 there | AEDT’s 09:00–17:00 there | Shared on AEST, over the next 12 months | Shared on AEDT, over the next 12 months |
|---|---|---|---|---|
| UTC | 23:00–07:00 (previous day) | 22:00–06:00 (previous day) | — | — |
| New York | 18:00–02:00 (previous day) / 19:00–03:00 (previous day) | 17:00–01:00 (previous day) / 18:00–02:00 (previous day) | none all year | none all year |
| London | 23:00–07:00 (previous day) / 00:00–08:00 | 22:00–06:00 (previous day) / 23:00–07:00 (previous day) | none all year | none all year |
| Tokyo | 08:00–16:00 | 07:00–15:00 | always 7 h | always 6 h |
At 09:00 on a Monday on AEST time, São Paulo, Lima, Mexico City, New York, Bogotá, Rio de Janeiro and 27 more are still on Sunday. For part of the year, so are London, Dublin, Manchester, Lisbon and Edinburgh. At 17:00 on a Friday on AEST time, no city in this directory has reached Saturday yet.
For the working hours Sydney shares with New York, London and Tokyo, and for its sunrise and sunset through the year, see the Sydney page.
How AEST and AEDT compare with other zones
Right now AEST runs ahead of every reference zone in the table: UTC, New York, London, Berlin, Dubai, Kolkata, Singapore, Tokyo and Los Angeles.
| Zone | UTC offset | Difference from AEST | Difference from AEDT | Against AEST, over the next 12 months |
|---|---|---|---|---|
| UTC | UTC+00:00 | 10h ahead | 11h ahead | all year |
| New York | UTC-05:00 | 15h ahead | 16h ahead | 15h ahead / 14h ahead |
| London | UTC+00:00 | 10h ahead | 11h ahead | 10h ahead / 9h ahead |
| Berlin | UTC+01:00 | 9h ahead | 10h ahead | 9h ahead / 8h ahead |
| Dubai | UTC+04:00 | 6h ahead | 7h ahead | all year |
| Kolkata | UTC+05:30 | 4h 30m ahead | 5h 30m ahead | all year |
| Singapore | UTC+08:00 | 2h ahead | 3h ahead | all year |
| Tokyo | UTC+09:00 | 1h ahead | 2h ahead | all year |
| Los Angeles | UTC-08:00 | 18h ahead | 19h ahead | 18h ahead / 17h ahead |
Cities using AEST and AEDT
AEST
AEDT
Convert AEST and AEDT to another zone
Related time zones
Time zone rules: IANA tz database release 2026c, applied when this page was generated on 2026-11-02.
Frequently asked questions
What are AEST and AEDT?
AEST is Australian Eastern Standard Time, UTC+10:00, and AEDT is Australian Eastern Daylight Time, UTC+11:00. AEDT runs from the first Sunday in October to the first Sunday in April.
What is the IANA identifier for AEST and AEDT?
Australia/Sydney, named after Sydney. It has moved between UTC+10:00 and UTC+11:00 on the same yearly pattern since 2008.
When is it AEST and when is it AEDT in Sydney?
Over the coming year Sydney is on AEDT (UTC+11:00) until April 4, 2027 and from October 3, 2027, and on AEST (UTC+10:00) from April 4, 2027 to October 3, 2027. The labels themselves never move: AEST always means UTC+10:00 and AEDT always means UTC+11:00. Brisbane keeps AEST all year.
What time is it on AEST and AEDT when it is 09:00 in London?
On AEST: 19:00 until March 28, 2027 and from October 31, 2027; 18:00 from March 28, 2027 to October 31, 2027. On AEDT: 20:00 until March 28, 2027 and from October 31, 2027; 19:00 from March 28, 2027 to October 31, 2027.