Atlantic/Jan_Mayen

Time zone identifier: Atlantic/Jan_Mayen

Current civil offset: +01:00 (CET)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1893-03-31

Local Mean Time (LMT): +00:53:28 based on geographic meridian

Total recorded transitions: 143 transitions across 4 distinct offsets

Historical Offset Step Chart (1880 to Present)

Text summary: Atlantic/Jan_Mayen shifted between 4 distinct offsets from 1893-03-31 through the modern era.

Complete Transition History (143 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1893-03-31T23:06:32Z`	`1893-04-01 00:06:32`	+00:53:28 → +01:00	`CET`	No	gap
`1916-04-30T22:00:00Z`	`1916-05-01 00:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1916-09-30T23:00:00Z`	`1916-10-01 00:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1917-04-16T01:00:00Z`	`1917-04-16 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1917-09-17T01:00:00Z`	`1917-09-17 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1918-04-15T01:00:00Z`	`1918-04-15 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1918-09-16T01:00:00Z`	`1918-09-16 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1940-04-01T01:00:00Z`	`1940-04-01 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1942-11-02T01:00:00Z`	`1942-11-02 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1943-03-29T01:00:00Z`	`1943-03-29 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1943-10-04T01:00:00Z`	`1943-10-04 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1944-04-03T01:00:00Z`	`1944-04-03 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1944-10-02T01:00:00Z`	`1944-10-02 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1945-04-02T01:00:00Z`	`1945-04-02 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1945-05-24T00:00:00Z`	`1945-05-24 03:00:00`	+02:00 → +03:00	`CEMT`	Yes	gap
`1945-09-24T00:00:00Z`	`1945-09-24 02:00:00`	+03:00 → +02:00	`CEST`	Yes	overlap
`1945-11-18T01:00:00Z`	`1945-11-18 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1946-04-14T01:00:00Z`	`1946-04-14 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1946-10-07T01:00:00Z`	`1946-10-07 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1947-04-06T02:00:00Z`	`1947-04-06 04:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1947-05-11T01:00:00Z`	`1947-05-11 04:00:00`	+02:00 → +03:00	`CEMT`	Yes	gap
`1947-06-29T00:00:00Z`	`1947-06-29 02:00:00`	+03:00 → +02:00	`CEST`	Yes	overlap
`1947-10-05T01:00:00Z`	`1947-10-05 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1948-04-18T01:00:00Z`	`1948-04-18 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1948-10-03T01:00:00Z`	`1948-10-03 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1949-04-10T01:00:00Z`	`1949-04-10 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1949-10-02T01:00:00Z`	`1949-10-02 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1980-04-06T01:00:00Z`	`1980-04-06 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1980-09-28T01:00:00Z`	`1980-09-28 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1981-03-29T01:00:00Z`	`1981-03-29 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1981-09-27T01:00:00Z`	`1981-09-27 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1982-03-28T01:00:00Z`	`1982-03-28 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1982-09-26T01:00:00Z`	`1982-09-26 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1983-03-27T01:00:00Z`	`1983-03-27 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1983-09-25T01:00:00Z`	`1983-09-25 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1984-03-25T01:00:00Z`	`1984-03-25 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1984-09-30T01:00:00Z`	`1984-09-30 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1985-03-31T01:00:00Z`	`1985-03-31 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1985-09-29T01:00:00Z`	`1985-09-29 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1986-03-30T01:00:00Z`	`1986-03-30 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1986-09-28T01:00:00Z`	`1986-09-28 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1987-03-29T01:00:00Z`	`1987-03-29 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1987-09-27T01:00:00Z`	`1987-09-27 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1988-03-27T01:00:00Z`	`1988-03-27 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1988-09-25T01:00:00Z`	`1988-09-25 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1989-03-26T01:00:00Z`	`1989-03-26 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1989-09-24T01:00:00Z`	`1989-09-24 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1990-03-25T01:00:00Z`	`1990-03-25 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1990-09-30T01:00:00Z`	`1990-09-30 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1991-03-31T01:00:00Z`	`1991-03-31 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1991-09-29T01:00:00Z`	`1991-09-29 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1992-03-29T01:00:00Z`	`1992-03-29 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1992-09-27T01:00:00Z`	`1992-09-27 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1993-03-28T01:00:00Z`	`1993-03-28 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1993-09-26T01:00:00Z`	`1993-09-26 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1994-03-27T01:00:00Z`	`1994-03-27 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1994-09-25T01:00:00Z`	`1994-09-25 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1995-03-26T01:00:00Z`	`1995-03-26 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1995-09-24T01:00:00Z`	`1995-09-24 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1996-03-31T01:00:00Z`	`1996-03-31 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1996-10-27T01:00:00Z`	`1996-10-27 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1997-03-30T01:00:00Z`	`1997-03-30 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1997-10-26T01:00:00Z`	`1997-10-26 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1998-03-29T01:00:00Z`	`1998-03-29 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1998-10-25T01:00:00Z`	`1998-10-25 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`1999-03-28T01:00:00Z`	`1999-03-28 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`1999-10-31T01:00:00Z`	`1999-10-31 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2000-03-26T01:00:00Z`	`2000-03-26 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2000-10-29T01:00:00Z`	`2000-10-29 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2001-03-25T01:00:00Z`	`2001-03-25 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2001-10-28T01:00:00Z`	`2001-10-28 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2002-03-31T01:00:00Z`	`2002-03-31 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2002-10-27T01:00:00Z`	`2002-10-27 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2003-03-30T01:00:00Z`	`2003-03-30 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2003-10-26T01:00:00Z`	`2003-10-26 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2004-03-28T01:00:00Z`	`2004-03-28 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2004-10-31T01:00:00Z`	`2004-10-31 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2005-03-27T01:00:00Z`	`2005-03-27 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2005-10-30T01:00:00Z`	`2005-10-30 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2006-03-26T01:00:00Z`	`2006-03-26 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2006-10-29T01:00:00Z`	`2006-10-29 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2007-03-25T01:00:00Z`	`2007-03-25 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2007-10-28T01:00:00Z`	`2007-10-28 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2008-03-30T01:00:00Z`	`2008-03-30 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2008-10-26T01:00:00Z`	`2008-10-26 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2009-03-29T01:00:00Z`	`2009-03-29 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2009-10-25T01:00:00Z`	`2009-10-25 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2010-03-28T01:00:00Z`	`2010-03-28 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2010-10-31T01:00:00Z`	`2010-10-31 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2011-03-27T01:00:00Z`	`2011-03-27 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2011-10-30T01:00:00Z`	`2011-10-30 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2012-03-25T01:00:00Z`	`2012-03-25 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2012-10-28T01:00:00Z`	`2012-10-28 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2013-03-31T01:00:00Z`	`2013-03-31 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2013-10-27T01:00:00Z`	`2013-10-27 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2014-03-30T01:00:00Z`	`2014-03-30 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2014-10-26T01:00:00Z`	`2014-10-26 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2015-03-29T01:00:00Z`	`2015-03-29 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2015-10-25T01:00:00Z`	`2015-10-25 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2016-03-27T01:00:00Z`	`2016-03-27 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2016-10-30T01:00:00Z`	`2016-10-30 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2017-03-26T01:00:00Z`	`2017-03-26 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2017-10-29T01:00:00Z`	`2017-10-29 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2018-03-25T01:00:00Z`	`2018-03-25 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2018-10-28T01:00:00Z`	`2018-10-28 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2019-03-31T01:00:00Z`	`2019-03-31 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2019-10-27T01:00:00Z`	`2019-10-27 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2020-03-29T01:00:00Z`	`2020-03-29 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2020-10-25T01:00:00Z`	`2020-10-25 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2021-03-28T01:00:00Z`	`2021-03-28 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2021-10-31T01:00:00Z`	`2021-10-31 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2022-03-27T01:00:00Z`	`2022-03-27 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2022-10-30T01:00:00Z`	`2022-10-30 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2023-03-26T01:00:00Z`	`2023-03-26 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2023-10-29T01:00:00Z`	`2023-10-29 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2024-03-31T01:00:00Z`	`2024-03-31 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2024-10-27T01:00:00Z`	`2024-10-27 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2025-03-30T01:00:00Z`	`2025-03-30 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2025-10-26T01:00:00Z`	`2025-10-26 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2026-03-29T01:00:00Z`	`2026-03-29 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2026-10-25T01:00:00Z`	`2026-10-25 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2027-03-28T01:00:00Z`	`2027-03-28 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2027-10-31T01:00:00Z`	`2027-10-31 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2028-03-26T01:00:00Z`	`2028-03-26 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2028-10-29T01:00:00Z`	`2028-10-29 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2029-03-25T01:00:00Z`	`2029-03-25 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2029-10-28T01:00:00Z`	`2029-10-28 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2030-03-31T01:00:00Z`	`2030-03-31 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2030-10-27T01:00:00Z`	`2030-10-27 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2031-03-30T01:00:00Z`	`2031-03-30 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2031-10-26T01:00:00Z`	`2031-10-26 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2032-03-28T01:00:00Z`	`2032-03-28 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2032-10-31T01:00:00Z`	`2032-10-31 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2033-03-27T01:00:00Z`	`2033-03-27 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2033-10-30T01:00:00Z`	`2033-10-30 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2034-03-26T01:00:00Z`	`2034-03-26 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2034-10-29T01:00:00Z`	`2034-10-29 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2035-03-25T01:00:00Z`	`2035-03-25 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2035-10-28T01:00:00Z`	`2035-10-28 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2036-03-30T01:00:00Z`	`2036-03-30 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2036-10-26T01:00:00Z`	`2036-10-26 02:00:00`	+02:00 → +01:00	`CET`	No	overlap
`2037-03-29T01:00:00Z`	`2037-03-29 03:00:00`	+01:00 → +02:00	`CEST`	Yes	gap
`2037-10-25T01:00:00Z`	`2037-10-25 02:00:00`	+02:00 → +01:00	`CET`	No	overlap

Notes from the Maintainers

Source: backzone (Lines 1145 to 1147)

Jan Mayen
From Whitman:

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.