Atlantic/Azores

Time zone identifier: Atlantic/Azores

Current civil offset: -01:00 (-01)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1884-01-01

Local Mean Time (LMT): -01:42:40 based on geographic meridian

Total recorded transitions: 216 transitions across 6 distinct offsets

Associated countries: PT

Historical Offset Step Chart (1880 to Present)

Text summary: Atlantic/Azores shifted between 6 distinct offsets from 1884-01-01 through the modern era.

Complete Transition History (216 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1884-01-01T01:42:40Z`	`1883-12-31 23:48:08`	-01:42:40 → -01:54:32	`HMT`	No	overlap
`1912-01-01T02:00:00Z`	`1912-01-01 00:00:00`	-01:54:32 → -02:00	`-02`	No	overlap
`1916-06-18T01:00:00Z`	`1916-06-18 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1916-11-01T02:00:00Z`	`1916-11-01 00:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1917-03-01T02:00:00Z`	`1917-03-01 01:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1917-10-15T01:00:00Z`	`1917-10-14 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1918-03-01T02:00:00Z`	`1918-03-01 01:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1918-10-15T01:00:00Z`	`1918-10-14 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1919-03-01T02:00:00Z`	`1919-03-01 01:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1919-10-15T01:00:00Z`	`1919-10-14 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1920-03-01T02:00:00Z`	`1920-03-01 01:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1920-10-15T01:00:00Z`	`1920-10-14 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1921-03-01T02:00:00Z`	`1921-03-01 01:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1921-10-15T01:00:00Z`	`1921-10-14 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1924-04-17T01:00:00Z`	`1924-04-17 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1924-10-05T01:00:00Z`	`1924-10-04 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1926-04-18T01:00:00Z`	`1926-04-18 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1926-10-03T01:00:00Z`	`1926-10-02 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1927-04-10T01:00:00Z`	`1927-04-10 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1927-10-02T01:00:00Z`	`1927-10-01 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1928-04-15T01:00:00Z`	`1928-04-15 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1928-10-07T01:00:00Z`	`1928-10-06 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1929-04-21T01:00:00Z`	`1929-04-21 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1929-10-06T01:00:00Z`	`1929-10-05 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1931-04-19T01:00:00Z`	`1931-04-19 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1931-10-04T01:00:00Z`	`1931-10-03 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1932-04-03T01:00:00Z`	`1932-04-03 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1932-10-02T01:00:00Z`	`1932-10-01 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1934-04-08T01:00:00Z`	`1934-04-08 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1934-10-07T01:00:00Z`	`1934-10-06 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1935-03-31T01:00:00Z`	`1935-03-31 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1935-10-06T01:00:00Z`	`1935-10-05 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1936-04-19T01:00:00Z`	`1936-04-19 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1936-10-04T01:00:00Z`	`1936-10-03 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1937-04-04T01:00:00Z`	`1937-04-04 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1937-10-03T01:00:00Z`	`1937-10-02 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1938-03-27T01:00:00Z`	`1938-03-27 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1938-10-02T01:00:00Z`	`1938-10-01 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1939-04-16T01:00:00Z`	`1939-04-16 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1939-11-19T01:00:00Z`	`1939-11-18 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1940-02-25T01:00:00Z`	`1940-02-25 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1940-10-08T01:00:00Z`	`1940-10-07 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1941-04-06T01:00:00Z`	`1941-04-06 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1941-10-06T01:00:00Z`	`1941-10-05 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1942-03-15T01:00:00Z`	`1942-03-15 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1942-04-26T00:00:00Z`	`1942-04-26 00:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1942-08-16T00:00:00Z`	`1942-08-15 23:00:00`	+00:00 → -01:00	`-01`	Yes	overlap
`1942-10-25T01:00:00Z`	`1942-10-24 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1943-03-14T01:00:00Z`	`1943-03-14 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1943-04-18T00:00:00Z`	`1943-04-18 00:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1943-08-29T00:00:00Z`	`1943-08-28 23:00:00`	+00:00 → -01:00	`-01`	Yes	overlap
`1943-10-31T01:00:00Z`	`1943-10-30 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1944-03-12T01:00:00Z`	`1944-03-12 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1944-04-23T00:00:00Z`	`1944-04-23 00:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1944-08-27T00:00:00Z`	`1944-08-26 23:00:00`	+00:00 → -01:00	`-01`	Yes	overlap
`1944-10-29T01:00:00Z`	`1944-10-28 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1945-03-11T01:00:00Z`	`1945-03-11 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1945-04-22T00:00:00Z`	`1945-04-22 00:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1945-08-26T00:00:00Z`	`1945-08-25 23:00:00`	+00:00 → -01:00	`-01`	Yes	overlap
`1945-10-28T01:00:00Z`	`1945-10-27 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1946-04-07T01:00:00Z`	`1946-04-07 00:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1946-10-06T01:00:00Z`	`1946-10-05 23:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1947-04-06T04:00:00Z`	`1947-04-06 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1947-10-05T04:00:00Z`	`1947-10-05 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1948-04-04T04:00:00Z`	`1948-04-04 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1948-10-03T04:00:00Z`	`1948-10-03 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1949-04-03T04:00:00Z`	`1949-04-03 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1949-10-02T04:00:00Z`	`1949-10-02 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1950-04-02T04:00:00Z`	`1950-04-02 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1950-10-01T04:00:00Z`	`1950-10-01 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1951-04-01T04:00:00Z`	`1951-04-01 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1951-10-07T04:00:00Z`	`1951-10-07 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1952-04-06T04:00:00Z`	`1952-04-06 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1952-10-05T04:00:00Z`	`1952-10-05 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1953-04-05T04:00:00Z`	`1953-04-05 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1953-10-04T04:00:00Z`	`1953-10-04 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1954-04-04T04:00:00Z`	`1954-04-04 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1954-10-03T04:00:00Z`	`1954-10-03 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1955-04-03T04:00:00Z`	`1955-04-03 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1955-10-02T04:00:00Z`	`1955-10-02 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1956-04-01T04:00:00Z`	`1956-04-01 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1956-10-07T04:00:00Z`	`1956-10-07 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1957-04-07T04:00:00Z`	`1957-04-07 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1957-10-06T04:00:00Z`	`1957-10-06 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1958-04-06T04:00:00Z`	`1958-04-06 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1958-10-05T04:00:00Z`	`1958-10-05 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1959-04-05T04:00:00Z`	`1959-04-05 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1959-10-04T04:00:00Z`	`1959-10-04 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1960-04-03T04:00:00Z`	`1960-04-03 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1960-10-02T04:00:00Z`	`1960-10-02 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1961-04-02T04:00:00Z`	`1961-04-02 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1961-10-01T04:00:00Z`	`1961-10-01 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1962-04-01T04:00:00Z`	`1962-04-01 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1962-10-07T04:00:00Z`	`1962-10-07 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1963-04-07T04:00:00Z`	`1963-04-07 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1963-10-06T04:00:00Z`	`1963-10-06 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1964-04-05T04:00:00Z`	`1964-04-05 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1964-10-04T04:00:00Z`	`1964-10-04 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1965-04-04T04:00:00Z`	`1965-04-04 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1965-10-03T04:00:00Z`	`1965-10-03 02:00:00`	-01:00 → -02:00	`-02`	No	overlap
`1966-04-03T04:00:00Z`	`1966-04-03 03:00:00`	-02:00 → -01:00	`-01`	Yes	gap
`1966-10-02T04:00:00Z`	`1966-10-02 03:00:00`	-01:00 → -01:00	`-01`	No	offset-only
`1982-03-28T01:00:00Z`	`1982-03-28 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1982-09-26T01:00:00Z`	`1982-09-26 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1983-03-27T01:00:00Z`	`1983-03-27 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1983-09-25T01:00:00Z`	`1983-09-25 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1984-03-25T01:00:00Z`	`1984-03-25 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1984-09-30T01:00:00Z`	`1984-09-30 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1985-03-31T01:00:00Z`	`1985-03-31 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1985-09-29T01:00:00Z`	`1985-09-29 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1986-03-30T01:00:00Z`	`1986-03-30 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1986-09-28T01:00:00Z`	`1986-09-28 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1987-03-29T01:00:00Z`	`1987-03-29 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1987-09-27T01:00:00Z`	`1987-09-27 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1988-03-27T01:00:00Z`	`1988-03-27 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1988-09-25T01:00:00Z`	`1988-09-25 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1989-03-26T01:00:00Z`	`1989-03-26 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1989-09-24T01:00:00Z`	`1989-09-24 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1990-03-25T01:00:00Z`	`1990-03-25 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1990-09-30T01:00:00Z`	`1990-09-30 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1991-03-31T01:00:00Z`	`1991-03-31 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1991-09-29T01:00:00Z`	`1991-09-29 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1992-03-29T01:00:00Z`	`1992-03-29 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1992-09-27T01:00:00Z`	`1992-09-27 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1992-12-27T02:00:00Z`	`1992-12-27 02:00:00`	-01:00 → +00:00	`WET`	No	gap
`1993-03-28T01:00:00Z`	`1993-03-28 02:00:00`	+00:00 → +01:00	`WEST`	Yes	gap
`1993-06-17T01:00:00Z`	`1993-06-17 01:00:00`	+01:00 → +00:00	`+00`	Yes	overlap
`1993-09-26T01:00:00Z`	`1993-09-26 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1994-03-27T01:00:00Z`	`1994-03-27 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1994-09-25T01:00:00Z`	`1994-09-25 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1995-03-26T01:00:00Z`	`1995-03-26 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1995-09-24T01:00:00Z`	`1995-09-24 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1996-03-31T01:00:00Z`	`1996-03-31 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1996-10-27T01:00:00Z`	`1996-10-27 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1997-03-30T01:00:00Z`	`1997-03-30 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1997-10-26T01:00:00Z`	`1997-10-26 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1998-03-29T01:00:00Z`	`1998-03-29 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1998-10-25T01:00:00Z`	`1998-10-25 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1999-03-28T01:00:00Z`	`1999-03-28 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1999-10-31T01:00:00Z`	`1999-10-31 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2000-03-26T01:00:00Z`	`2000-03-26 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2000-10-29T01:00:00Z`	`2000-10-29 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2001-03-25T01:00:00Z`	`2001-03-25 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2001-10-28T01:00:00Z`	`2001-10-28 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2002-03-31T01:00:00Z`	`2002-03-31 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2002-10-27T01:00:00Z`	`2002-10-27 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2003-03-30T01:00:00Z`	`2003-03-30 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2003-10-26T01:00:00Z`	`2003-10-26 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2004-03-28T01:00:00Z`	`2004-03-28 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2004-10-31T01:00:00Z`	`2004-10-31 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2005-03-27T01:00:00Z`	`2005-03-27 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2005-10-30T01:00:00Z`	`2005-10-30 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2006-03-26T01:00:00Z`	`2006-03-26 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2006-10-29T01:00:00Z`	`2006-10-29 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2007-03-25T01:00:00Z`	`2007-03-25 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2007-10-28T01:00:00Z`	`2007-10-28 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2008-03-30T01:00:00Z`	`2008-03-30 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2008-10-26T01:00:00Z`	`2008-10-26 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2009-03-29T01:00:00Z`	`2009-03-29 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2009-10-25T01:00:00Z`	`2009-10-25 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2010-03-28T01:00:00Z`	`2010-03-28 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2010-10-31T01:00:00Z`	`2010-10-31 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2011-03-27T01:00:00Z`	`2011-03-27 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2011-10-30T01:00:00Z`	`2011-10-30 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2012-03-25T01:00:00Z`	`2012-03-25 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2012-10-28T01:00:00Z`	`2012-10-28 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2013-03-31T01:00:00Z`	`2013-03-31 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2013-10-27T01:00:00Z`	`2013-10-27 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2014-03-30T01:00:00Z`	`2014-03-30 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2014-10-26T01:00:00Z`	`2014-10-26 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2015-03-29T01:00:00Z`	`2015-03-29 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2015-10-25T01:00:00Z`	`2015-10-25 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2016-03-27T01:00:00Z`	`2016-03-27 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2016-10-30T01:00:00Z`	`2016-10-30 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2017-03-26T01:00:00Z`	`2017-03-26 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2017-10-29T01:00:00Z`	`2017-10-29 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2018-03-25T01:00:00Z`	`2018-03-25 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2018-10-28T01:00:00Z`	`2018-10-28 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2019-03-31T01:00:00Z`	`2019-03-31 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2019-10-27T01:00:00Z`	`2019-10-27 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2020-03-29T01:00:00Z`	`2020-03-29 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2020-10-25T01:00:00Z`	`2020-10-25 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2021-03-28T01:00:00Z`	`2021-03-28 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2021-10-31T01:00:00Z`	`2021-10-31 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2022-03-27T01:00:00Z`	`2022-03-27 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2022-10-30T01:00:00Z`	`2022-10-30 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2023-03-26T01:00:00Z`	`2023-03-26 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2023-10-29T01:00:00Z`	`2023-10-29 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2024-03-31T01:00:00Z`	`2024-03-31 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2024-10-27T01:00:00Z`	`2024-10-27 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2025-03-30T01:00:00Z`	`2025-03-30 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2025-10-26T01:00:00Z`	`2025-10-26 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2026-03-29T01:00:00Z`	`2026-03-29 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2026-10-25T01:00:00Z`	`2026-10-25 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2027-03-28T01:00:00Z`	`2027-03-28 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2027-10-31T01:00:00Z`	`2027-10-31 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2028-03-26T01:00:00Z`	`2028-03-26 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2028-10-29T01:00:00Z`	`2028-10-29 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2029-03-25T01:00:00Z`	`2029-03-25 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2029-10-28T01:00:00Z`	`2029-10-28 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2030-03-31T01:00:00Z`	`2030-03-31 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2030-10-27T01:00:00Z`	`2030-10-27 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2031-03-30T01:00:00Z`	`2031-03-30 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2031-10-26T01:00:00Z`	`2031-10-26 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2032-03-28T01:00:00Z`	`2032-03-28 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2032-10-31T01:00:00Z`	`2032-10-31 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2033-03-27T01:00:00Z`	`2033-03-27 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2033-10-30T01:00:00Z`	`2033-10-30 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2034-03-26T01:00:00Z`	`2034-03-26 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2034-10-29T01:00:00Z`	`2034-10-29 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2035-03-25T01:00:00Z`	`2035-03-25 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2035-10-28T01:00:00Z`	`2035-10-28 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2036-03-30T01:00:00Z`	`2036-03-30 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2036-10-26T01:00:00Z`	`2036-10-26 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`2037-03-29T01:00:00Z`	`2037-03-29 01:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`2037-10-25T01:00:00Z`	`2037-10-25 00:00:00`	+00:00 → -01:00	`-01`	No	overlap

Notes from the Maintainers

Source: europe (Lines 2376 to 2393)

From Tim Parenti (2024-07-01):
For the Azores and Madeira, legislation was followed from the laws currently
in force as listed at:
https://oal.ul.pt/hora-legal/legislacao/
working backward through references of revocation and abrogation to
Decreto-Lei 47233 of 1966-10-01, the last time DST was abolished across the
mainland and its adjacent islands.

From Tim Parenti (2026-05-26):
Observance of DST on the Azores and Madeira was explicitly covered by
mainland legislation in:
- Portaria 11767 of 1947-03-28 for 1947,
- Portaria 12286 of 1948-02-19 for 1948, and
- Decreto-Lei 37048 of 1948-09-07 through its revocation in 1966.
(See mainland commentary, above.)  However, most legislation prior to 1947
didn't explicitly call out these "adjacent islands", so we assume that DST
rules on the islands prior to 1947 were also like that of the mainland.

Attributed Statements:

Tim Parenti (2024-07-01):

For the Azores and Madeira, legislation was followed from the laws currently in force as listed at: https://oal.ul.pt/hora-legal/legislacao/ working backward through references of revocation and abrogation to Decreto-Lei 47233 of 1966-10-01, the last time DST was abolished across the mainland and its adjacent islands.

Tim Parenti (2026-05-26):

Observance of DST on the Azores and Madeira was explicitly covered by mainland legislation in: - Portaria 11767 of 1947-03-28 for 1947, - Portaria 12286 of 1948-02-19 for 1948, and - Decreto-Lei 37048 of 1948-09-07 through its revocation in 1966. (See mainland commentary, above.) However, most legislation prior to 1947 didn't explicitly call out these "adjacent islands", so we assume that DST rules on the islands prior to 1947 were also like that of the mainland.

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.