Historically distinct IANA time zone
Antarctica/McMurdo
Local time now
NZST · current offset
- Countries
- Antarctica
- GPS reference
- 77.83° S, 166.60° E
- Data source
- IANA backzone
- Aliases
- None
- Rule groups
- NZ
AntarcticaNew Zealand time - McMurdo, South Pole
Geographic context
Where this clock belongs
The map marks the IANA reference location and associated country, not a time-zone boundary.
GPS reference: 77.83° S, 166.60° E. Associated countries: AQ.
The Wikipedia link provides additional context; it is not evidence for a historical claim. Transition data comes from the IANA source file.
Notes from the time database
The story behind the clock
These source notes describe a period or rule. They do not, by themselves, establish a causal claim for a particular clock change.
Since 1957 Chatham has been 45 minutes ahead of NZ, but until 2018a there was no documented single notation for the date and time of this transition. Duplicate the Rule lines for now, to give the 2018a change time to percolate out.
Original IANA source file: australasia.
Civil-time record
Recorded changes over time
From 1868 to 2027 · 136 recorded transitions
Recurring daylight-saving changes are grouped separately when JavaScript is available.
Notable changes
One-off changes and transitions outside the recurring seasonal rhythm.
- +11:30 · NZMTStandard time applies
- +12:30 · NZSTDaylight saving time begins
- +11:30 · NZMTStandard time applies
- +12:00 · NZSTDaylight saving time begins
- +11:30 · NZMTStandard time applies
- +12:00 · NZSTDaylight saving time begins
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1868-11-01 23:50 | +11:30 | NZMT | Standard time |
| 1927-11-06 03:00 | +12:30 | NZST | Daylight saving time |
| 1928-03-04 01:00 | +11:30 | NZMT | Standard time |
| 1928-10-14 02:30 | +12:00 | NZST | Daylight saving time |
| 1929-03-17 01:30 | +11:30 | NZMT | Standard time |
| 1929-10-13 02:30 | +12:00 | NZST | Daylight saving time |
| 1930-03-16 01:30 | +11:30 | NZMT | Standard time |
| 1930-10-12 02:30 | +12:00 | NZST | Daylight saving time |
| 1931-03-15 01:30 | +11:30 | NZMT | Standard time |
| 1931-10-11 02:30 | +12:00 | NZST | Daylight saving time |
| 1932-03-20 01:30 | +11:30 | NZMT | Standard time |
| 1932-10-09 02:30 | +12:00 | NZST | Daylight saving time |
| 1933-03-19 01:30 | +11:30 | NZMT | Standard time |
| 1933-10-08 02:30 | +12:00 | NZST | Daylight saving time |
| 1934-04-29 01:30 | +11:30 | NZMT | Standard time |
| 1934-09-30 02:30 | +12:00 | NZST | Daylight saving time |
| 1935-04-28 01:30 | +11:30 | NZMT | Standard time |
| 1935-09-29 02:30 | +12:00 | NZST | Daylight saving time |
| 1936-04-26 01:30 | +11:30 | NZMT | Standard time |
| 1936-09-27 02:30 | +12:00 | NZST | Daylight saving time |
| 1937-04-25 01:30 | +11:30 | NZMT | Standard time |
| 1937-09-26 02:30 | +12:00 | NZST | Daylight saving time |
| 1938-04-24 01:30 | +11:30 | NZMT | Standard time |
| 1938-09-25 02:30 | +12:00 | NZST | Daylight saving time |
| 1939-04-30 01:30 | +11:30 | NZMT | Standard time |
| 1939-09-24 02:30 | +12:00 | NZST | Daylight saving time |
| 1940-04-28 01:30 | +11:30 | NZMT | Standard time |
| 1940-09-29 02:30 | +12:00 | NZST | Daylight saving time |
| 1946-01-01 00:00 | +12:00 | NZST | Standard time |
| 1974-11-03 03:00 | +13:00 | NZDT | Daylight saving time |
| 1975-02-23 02:00 | +12:00 | NZST | Standard time |
| 1975-10-26 03:00 | +13:00 | NZDT | Daylight saving time |
| 1976-03-07 02:00 | +12:00 | NZST | Standard time |
| 1976-10-31 03:00 | +13:00 | NZDT | Daylight saving time |
| 1977-03-06 02:00 | +12:00 | NZST | Standard time |
| 1977-10-30 03:00 | +13:00 | NZDT | Daylight saving time |
| 1978-03-05 02:00 | +12:00 | NZST | Standard time |
| 1978-10-29 03:00 | +13:00 | NZDT | Daylight saving time |
| 1979-03-04 02:00 | +12:00 | NZST | Standard time |
| 1979-10-28 03:00 | +13:00 | NZDT | Daylight saving time |
| 1980-03-02 02:00 | +12:00 | NZST | Standard time |
| 1980-10-26 03:00 | +13:00 | NZDT | Daylight saving time |
| 1981-03-01 02:00 | +12:00 | NZST | Standard time |
| 1981-10-25 03:00 | +13:00 | NZDT | Daylight saving time |
| 1982-03-07 02:00 | +12:00 | NZST | Standard time |
| 1982-10-31 03:00 | +13:00 | NZDT | Daylight saving time |
| 1983-03-06 02:00 | +12:00 | NZST | Standard time |
| 1983-10-30 03:00 | +13:00 | NZDT | Daylight saving time |
| 1984-03-04 02:00 | +12:00 | NZST | Standard time |
| 1984-10-28 03:00 | +13:00 | NZDT | Daylight saving time |
| 1985-03-03 02:00 | +12:00 | NZST | Standard time |
| 1985-10-27 03:00 | +13:00 | NZDT | Daylight saving time |
| 1986-03-02 02:00 | +12:00 | NZST | Standard time |
| 1986-10-26 03:00 | +13:00 | NZDT | Daylight saving time |
| 1987-03-01 02:00 | +12:00 | NZST | Standard time |
| 1987-10-25 03:00 | +13:00 | NZDT | Daylight saving time |
| 1988-03-06 02:00 | +12:00 | NZST | Standard time |
| 1988-10-30 03:00 | +13:00 | NZDT | Daylight saving time |
| 1989-03-05 02:00 | +12:00 | NZST | Standard time |
| 1989-10-08 03:00 | +13:00 | NZDT | Daylight saving time |
| 1990-03-18 02:00 | +12:00 | NZST | Standard time |
| 1990-10-07 03:00 | +13:00 | NZDT | Daylight saving time |
| 1991-03-17 02:00 | +12:00 | NZST | Standard time |
| 1991-10-06 03:00 | +13:00 | NZDT | Daylight saving time |
| 1992-03-15 02:00 | +12:00 | NZST | Standard time |
| 1992-10-04 03:00 | +13:00 | NZDT | Daylight saving time |
| 1993-03-21 02:00 | +12:00 | NZST | Standard time |
| 1993-10-03 03:00 | +13:00 | NZDT | Daylight saving time |
| 1994-03-20 02:00 | +12:00 | NZST | Standard time |
| 1994-10-02 03:00 | +13:00 | NZDT | Daylight saving time |
| 1995-03-19 02:00 | +12:00 | NZST | Standard time |
| 1995-10-01 03:00 | +13:00 | NZDT | Daylight saving time |
| 1996-03-17 02:00 | +12:00 | NZST | Standard time |
| 1996-10-06 03:00 | +13:00 | NZDT | Daylight saving time |
| 1997-03-16 02:00 | +12:00 | NZST | Standard time |
| 1997-10-05 03:00 | +13:00 | NZDT | Daylight saving time |
| 1998-03-15 02:00 | +12:00 | NZST | Standard time |
| 1998-10-04 03:00 | +13:00 | NZDT | Daylight saving time |
| 1999-03-21 02:00 | +12:00 | NZST | Standard time |
| 1999-10-03 03:00 | +13:00 | NZDT | Daylight saving time |
| 2000-03-19 02:00 | +12:00 | NZST | Standard time |
| 2000-10-01 03:00 | +13:00 | NZDT | Daylight saving time |
| 2001-03-18 02:00 | +12:00 | NZST | Standard time |
| 2001-10-07 03:00 | +13:00 | NZDT | Daylight saving time |
| 2002-03-17 02:00 | +12:00 | NZST | Standard time |
| 2002-10-06 03:00 | +13:00 | NZDT | Daylight saving time |
| 2003-03-16 02:00 | +12:00 | NZST | Standard time |
| 2003-10-05 03:00 | +13:00 | NZDT | Daylight saving time |
| 2004-03-21 02:00 | +12:00 | NZST | Standard time |
| 2004-10-03 03:00 | +13:00 | NZDT | Daylight saving time |
| 2005-03-20 02:00 | +12:00 | NZST | Standard time |
| 2005-10-02 03:00 | +13:00 | NZDT | Daylight saving time |
| 2006-03-19 02:00 | +12:00 | NZST | Standard time |
| 2006-10-01 03:00 | +13:00 | NZDT | Daylight saving time |
| 2007-03-18 02:00 | +12:00 | NZST | Standard time |
| 2007-09-30 03:00 | +13:00 | NZDT | Daylight saving time |
| 2008-04-06 02:00 | +12:00 | NZST | Standard time |
| 2008-09-28 03:00 | +13:00 | NZDT | Daylight saving time |
| 2009-04-05 02:00 | +12:00 | NZST | Standard time |
| 2009-09-27 03:00 | +13:00 | NZDT | Daylight saving time |
| 2010-04-04 02:00 | +12:00 | NZST | Standard time |
| 2010-09-26 03:00 | +13:00 | NZDT | Daylight saving time |
| 2011-04-03 02:00 | +12:00 | NZST | Standard time |
| 2011-09-25 03:00 | +13:00 | NZDT | Daylight saving time |
| 2012-04-01 02:00 | +12:00 | NZST | Standard time |
| 2012-09-30 03:00 | +13:00 | NZDT | Daylight saving time |
| 2013-04-07 02:00 | +12:00 | NZST | Standard time |
| 2013-09-29 03:00 | +13:00 | NZDT | Daylight saving time |
| 2014-04-06 02:00 | +12:00 | NZST | Standard time |
| 2014-09-28 03:00 | +13:00 | NZDT | Daylight saving time |
| 2015-04-05 02:00 | +12:00 | NZST | Standard time |
| 2015-09-27 03:00 | +13:00 | NZDT | Daylight saving time |
| 2016-04-03 02:00 | +12:00 | NZST | Standard time |
| 2016-09-25 03:00 | +13:00 | NZDT | Daylight saving time |
| 2017-04-02 02:00 | +12:00 | NZST | Standard time |
| 2017-09-24 03:00 | +13:00 | NZDT | Daylight saving time |
| 2018-04-01 02:00 | +12:00 | NZST | Standard time |
| 2018-09-30 03:00 | +13:00 | NZDT | Daylight saving time |
| 2019-04-07 02:00 | +12:00 | NZST | Standard time |
| 2019-09-29 03:00 | +13:00 | NZDT | Daylight saving time |
| 2020-04-05 02:00 | +12:00 | NZST | Standard time |
| 2020-09-27 03:00 | +13:00 | NZDT | Daylight saving time |
| 2021-04-04 02:00 | +12:00 | NZST | Standard time |
| 2021-09-26 03:00 | +13:00 | NZDT | Daylight saving time |
| 2022-04-03 02:00 | +12:00 | NZST | Standard time |
| 2022-09-25 03:00 | +13:00 | NZDT | Daylight saving time |
| 2023-04-02 02:00 | +12:00 | NZST | Standard time |
| 2023-09-24 03:00 | +13:00 | NZDT | Daylight saving time |
| 2024-04-07 02:00 | +12:00 | NZST | Standard time |
| 2024-09-29 03:00 | +13:00 | NZDT | Daylight saving time |
| 2025-04-06 02:00 | +12:00 | NZST | Standard time |
| 2025-09-28 03:00 | +13:00 | NZDT | Daylight saving time |
| 2026-04-05 02:00 | +12:00 | NZST | Standard time |
| 2026-09-27 03:00 | +13:00 | NZDT | Daylight saving time |
| 2027-04-04 02:00 | +12:00 | NZST | Standard time |
| 2027-09-26 03:00 | +13:00 | NZDT | Daylight saving time |