Zone NAME STDOFF RULES FORMAT [UNTIL]
Australia/Sydney
Time zone identifier: Australia/Sydney
Current civil offset: +11:00 (AEDT)
Current DST state: Observing Daylight Saving Time
First standard time adoption: Adopted on 1895-01-31
Local Mean Time (LMT): +10:04:52 based on geographic meridian
Total recorded transitions: 142 transitions across 3 distinct offsets
Associated countries: AU
Aliases (Link targets): Australia/ACT, Australia/Canberra, Australia/NSW
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Historical Offset Step Chart (1880 to Present)
Text summary: Australia/Sydney shifted between 3 distinct offsets from 1895-01-31 through the modern era.
Complete Transition History (142 Transitions)
| UTC Instant | Local Wall Time | Shift | Abbreviation | DST | Effect |
|---|---|---|---|---|---|
1895-01-31T13:55:08Z | 1895-01-31 23:55:08 | +10:04:52 → +10:00 | AEST | No | overlap |
1916-12-31T16:00:00Z | 1917-01-01 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1917-03-24T16:00:00Z | 1917-03-25 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1941-12-31T16:00:00Z | 1942-01-01 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1942-03-28T16:00:00Z | 1942-03-29 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1942-09-26T16:00:00Z | 1942-09-27 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1943-03-27T16:00:00Z | 1943-03-28 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1943-10-02T16:00:00Z | 1943-10-03 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1944-03-25T16:00:00Z | 1944-03-26 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1971-10-30T16:00:00Z | 1971-10-31 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1972-02-26T16:00:00Z | 1972-02-27 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1972-10-28T16:00:00Z | 1972-10-29 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1973-03-03T16:00:00Z | 1973-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1973-10-27T16:00:00Z | 1973-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1974-03-02T16:00:00Z | 1974-03-03 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1974-10-26T16:00:00Z | 1974-10-27 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1975-03-01T16:00:00Z | 1975-03-02 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1975-10-25T16:00:00Z | 1975-10-26 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1976-03-06T16:00:00Z | 1976-03-07 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1976-10-30T16:00:00Z | 1976-10-31 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1977-03-05T16:00:00Z | 1977-03-06 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1977-10-29T16:00:00Z | 1977-10-30 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1978-03-04T16:00:00Z | 1978-03-05 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1978-10-28T16:00:00Z | 1978-10-29 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1979-03-03T16:00:00Z | 1979-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1979-10-27T16:00:00Z | 1979-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1980-03-01T16:00:00Z | 1980-03-02 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1980-10-25T16:00:00Z | 1980-10-26 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1981-02-28T16:00:00Z | 1981-03-01 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1981-10-24T16:00:00Z | 1981-10-25 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1982-04-03T16:00:00Z | 1982-04-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1982-10-30T16:00:00Z | 1982-10-31 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1983-03-05T16:00:00Z | 1983-03-06 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1983-10-29T16:00:00Z | 1983-10-30 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1984-03-03T16:00:00Z | 1984-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1984-10-27T16:00:00Z | 1984-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1985-03-02T16:00:00Z | 1985-03-03 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1985-10-26T16:00:00Z | 1985-10-27 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1986-03-15T16:00:00Z | 1986-03-16 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1986-10-18T16:00:00Z | 1986-10-19 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1987-03-14T16:00:00Z | 1987-03-15 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1987-10-24T16:00:00Z | 1987-10-25 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1988-03-19T16:00:00Z | 1988-03-20 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1988-10-29T16:00:00Z | 1988-10-30 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1989-03-18T16:00:00Z | 1989-03-19 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1989-10-28T16:00:00Z | 1989-10-29 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1990-03-03T16:00:00Z | 1990-03-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1990-10-27T16:00:00Z | 1990-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1991-03-02T16:00:00Z | 1991-03-03 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1991-10-26T16:00:00Z | 1991-10-27 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1992-02-29T16:00:00Z | 1992-03-01 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1992-10-24T16:00:00Z | 1992-10-25 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1993-03-06T16:00:00Z | 1993-03-07 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1993-10-30T16:00:00Z | 1993-10-31 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1994-03-05T16:00:00Z | 1994-03-06 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1994-10-29T16:00:00Z | 1994-10-30 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1995-03-04T16:00:00Z | 1995-03-05 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1995-10-28T16:00:00Z | 1995-10-29 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1996-03-30T16:00:00Z | 1996-03-31 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1996-10-26T16:00:00Z | 1996-10-27 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1997-03-29T16:00:00Z | 1997-03-30 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1997-10-25T16:00:00Z | 1997-10-26 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1998-03-28T16:00:00Z | 1998-03-29 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1998-10-24T16:00:00Z | 1998-10-25 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
1999-03-27T16:00:00Z | 1999-03-28 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
1999-10-30T16:00:00Z | 1999-10-31 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2000-03-25T16:00:00Z | 2000-03-26 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2000-08-26T16:00:00Z | 2000-08-27 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2001-03-24T16:00:00Z | 2001-03-25 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2001-10-27T16:00:00Z | 2001-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2002-03-30T16:00:00Z | 2002-03-31 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2002-10-26T16:00:00Z | 2002-10-27 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2003-03-29T16:00:00Z | 2003-03-30 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2003-10-25T16:00:00Z | 2003-10-26 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2004-03-27T16:00:00Z | 2004-03-28 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2004-10-30T16:00:00Z | 2004-10-31 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2005-03-26T16:00:00Z | 2005-03-27 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2005-10-29T16:00:00Z | 2005-10-30 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2006-04-01T16:00:00Z | 2006-04-02 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2006-10-28T16:00:00Z | 2006-10-29 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2007-03-24T16:00:00Z | 2007-03-25 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2007-10-27T16:00:00Z | 2007-10-28 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2008-04-05T16:00:00Z | 2008-04-06 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2008-10-04T16:00:00Z | 2008-10-05 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2009-04-04T16:00:00Z | 2009-04-05 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2009-10-03T16:00:00Z | 2009-10-04 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2010-04-03T16:00:00Z | 2010-04-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2010-10-02T16:00:00Z | 2010-10-03 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2011-04-02T16:00:00Z | 2011-04-03 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2011-10-01T16:00:00Z | 2011-10-02 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2012-03-31T16:00:00Z | 2012-04-01 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2012-10-06T16:00:00Z | 2012-10-07 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2013-04-06T16:00:00Z | 2013-04-07 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2013-10-05T16:00:00Z | 2013-10-06 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2014-04-05T16:00:00Z | 2014-04-06 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2014-10-04T16:00:00Z | 2014-10-05 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2015-04-04T16:00:00Z | 2015-04-05 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2015-10-03T16:00:00Z | 2015-10-04 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2016-04-02T16:00:00Z | 2016-04-03 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2016-10-01T16:00:00Z | 2016-10-02 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2017-04-01T16:00:00Z | 2017-04-02 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2017-09-30T16:00:00Z | 2017-10-01 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2018-03-31T16:00:00Z | 2018-04-01 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2018-10-06T16:00:00Z | 2018-10-07 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2019-04-06T16:00:00Z | 2019-04-07 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2019-10-05T16:00:00Z | 2019-10-06 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2020-04-04T16:00:00Z | 2020-04-05 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2020-10-03T16:00:00Z | 2020-10-04 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2021-04-03T16:00:00Z | 2021-04-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2021-10-02T16:00:00Z | 2021-10-03 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2022-04-02T16:00:00Z | 2022-04-03 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2022-10-01T16:00:00Z | 2022-10-02 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2023-04-01T16:00:00Z | 2023-04-02 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2023-09-30T16:00:00Z | 2023-10-01 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2024-04-06T16:00:00Z | 2024-04-07 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2024-10-05T16:00:00Z | 2024-10-06 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2025-04-05T16:00:00Z | 2025-04-06 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2025-10-04T16:00:00Z | 2025-10-05 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2026-04-04T16:00:00Z | 2026-04-05 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2026-10-03T16:00:00Z | 2026-10-04 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2027-04-03T16:00:00Z | 2027-04-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2027-10-02T16:00:00Z | 2027-10-03 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2028-04-01T16:00:00Z | 2028-04-02 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2028-09-30T16:00:00Z | 2028-10-01 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2029-03-31T16:00:00Z | 2029-04-01 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2029-10-06T16:00:00Z | 2029-10-07 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2030-04-06T16:00:00Z | 2030-04-07 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2030-10-05T16:00:00Z | 2030-10-06 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2031-04-05T16:00:00Z | 2031-04-06 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2031-10-04T16:00:00Z | 2031-10-05 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2032-04-03T16:00:00Z | 2032-04-04 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2032-10-02T16:00:00Z | 2032-10-03 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2033-04-02T16:00:00Z | 2033-04-03 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2033-10-01T16:00:00Z | 2033-10-02 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2034-04-01T16:00:00Z | 2034-04-02 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2034-09-30T16:00:00Z | 2034-10-01 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2035-03-31T16:00:00Z | 2035-04-01 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2035-10-06T16:00:00Z | 2035-10-07 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2036-04-05T16:00:00Z | 2036-04-06 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2036-10-04T16:00:00Z | 2036-10-05 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
2037-04-04T16:00:00Z | 2037-04-05 02:00:00 | +11:00 → +10:00 | AEST | No | overlap |
2037-10-03T16:00:00Z | 2037-10-04 03:00:00 | +10:00 → +11:00 | AEDT | Yes | gap |
Notes from the Maintainers
Years on Record
Methodology Note: The 1970 Rule
tzdb guarantees accuracy for timestamps from 1970 onwards. Transitions prior to 1970 represent best-effort historical reconstructions.
australasia(Lines 183 to 183)