Antarctica/Macquarie

Time zone identifier: Antarctica/Macquarie

Current civil offset: +11:00 (AEDT)

Current DST state: Observing Daylight Saving Time

First standard time adoption: Adopted on 1899-11-01

Total recorded transitions: 144 transitions across 3 distinct offsets

Associated countries: AU

Historical Offset Step Chart (1880 to Present)

Text summary: Antarctica/Macquarie shifted between 3 distinct offsets from 1899-11-01 through the modern era.

Complete Transition History (144 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1899-11-01T00:00:00Z`	`1899-11-01 10:00:00`	+00:00 → +10:00	`AEST`	No	gap
`1916-09-30T16:00:00Z`	`1916-10-01 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
`1919-03-31T14:00:00Z`	`1919-03-31 14:00:00`	+10:00 → +00:00	`-00`	No	overlap
`1948-03-25T00:00:00Z`	`1948-03-25 10:00:00`	+00:00 → +10:00	`AEST`	No	gap
`1967-09-30T16:00:00Z`	`1967-10-01 03:00:00`	+10:00 → +11:00	`AEDT`	Yes	gap
`1968-03-30T16:00:00Z`	`1968-03-31 02:00:00`	+11:00 → +10:00	`AEST`	No	overlap
`1968-10-26T16:00:00Z`	`1968-10-27 03:00:00`	+10:00 → +11:00	`AEDT`	Yes	gap
`1969-03-08T16:00:00Z`	`1969-03-09 02:00:00`	+11:00 → +10:00	`AEST`	No	overlap
`1969-10-25T16:00:00Z`	`1969-10-26 03:00:00`	+10:00 → +11:00	`AEDT`	Yes	gap
`1970-03-07T16:00:00Z`	`1970-03-08 02:00:00`	+11:00 → +10:00	`AEST`	No	overlap
`1970-10-24T16:00:00Z`	`1970-10-25 03:00:00`	+10:00 → +11:00	`AEDT`	Yes	gap
`1971-03-13T16:00:00Z`	`1971-03-14 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
`1982-03-27T16:00:00Z`	`1982-03-28 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
`1983-03-26T16:00:00Z`	`1983-03-27 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
`1986-03-01T16:00:00Z`	`1986-03-02 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
`1990-03-17T16:00:00Z`	`1990-03-18 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
`1991-03-30T16:00:00Z`	`1991-03-31 02:00:00`	+11:00 → +10:00	`AEST`	No	overlap
`1991-10-05T16:00:00Z`	`1991-10-06 03:00:00`	+10:00 → +11:00	`AEDT`	Yes	gap
`1992-03-28T16:00:00Z`	`1992-03-29 02:00:00`	+11:00 → +10:00	`AEST`	No	overlap
`1992-10-03T16:00:00Z`	`1992-10-04 03:00:00`	+10:00 → +11:00	`AEDT`	Yes	gap
`1993-03-27T16:00:00Z`	`1993-03-28 02:00:00`	+11:00 → +10:00	`AEST`	No	overlap
`1993-10-02T16:00:00Z`	`1993-10-03 03:00:00`	+10:00 → +11:00	`AEDT`	Yes	gap
`1994-03-26T16:00:00Z`	`1994-03-27 02:00:00`	+11:00 → +10:00	`AEST`	No	overlap
`1994-10-01T16:00:00Z`	`1994-10-02 03:00:00`	+10:00 → +11:00	`AEDT`	Yes	gap
`1995-03-25T16:00:00Z`	`1995-03-26 02:00:00`	+11:00 → +10:00	`AEST`	No	overlap
`1995-09-30T16:00:00Z`	`1995-10-01 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
`1996-10-05T16:00:00Z`	`1996-10-06 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
`1997-10-04T16:00:00Z`	`1997-10-05 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
`1998-10-03T16:00:00Z`	`1998-10-04 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
`1999-10-02T16:00:00Z`	`1999-10-03 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
`2001-10-06T16:00:00Z`	`2001-10-07 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
`2002-10-05T16:00:00Z`	`2002-10-06 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
`2003-10-04T16:00:00Z`	`2003-10-05 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
`2004-10-02T16:00:00Z`	`2004-10-03 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
`2005-10-01T16:00:00Z`	`2005-10-02 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
`2006-09-30T16:00:00Z`	`2006-10-01 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
`2007-10-06T16:00:00Z`	`2007-10-07 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
`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

Source: australasia (Lines 214 to 243)

Australian miscellany

Ashmore Is, Cartier
no indigenous inhabitants; only seasonal caretakers
no times are set

Coral Sea Is
no indigenous inhabitants; only meteorologists
no times are set

Macquarie
Permanent occupation (scientific station) 1911-1915 and since 25 March 1948;
sealing and penguin oil station operated Nov 1899 to Apr 1919.  See the
Tasmania Parks & Wildlife Service history of sealing at Macquarie Island
http://www.parks.tas.gov.au/index.aspx?base=1828
http://www.parks.tas.gov.au/index.aspx?base=1831
Guess that it was like Australia/Hobart while inhabited before 2010.

From Steffen Thorsen (2010-03-10):
We got these changes from the Australian Antarctic Division:
- Macquarie Island will stay on UTC+11 for winter and therefore not
switch back from daylight savings time when other parts of Australia do
on 4 April.

From Arthur David Olson (2013-05-23):
The 1919 transition is overspecified below so pre-2013 zics
will produce a binary file with an [A]EST-type as the first 32-bit type;
this is required for correct handling of times before 1916 by
pre-2013 versions of localtime.

Attributed Statements:

Steffen Thorsen (2010-03-10):

We got these changes from the Australian Antarctic Division: - Macquarie Island will stay on UTC+11 for winter and therefore not switch back from daylight savings time when other parts of Australia do on 4 April.

Arthur David Olson (2013-05-23):

The 1919 transition is overspecified below so pre-2013 zics will produce a binary file with an [A]EST-type as the first 32-bit type; this is required for correct handling of times before 1916 by pre-2013 versions of localtime.

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.