Historically distinct IANA time zone

Europe/Dublin

Canonical IANA identifier · Data release 2026c

Local time now +01:00 IST · current offset

Countries: Ireland
GPS reference: 53.33° N, 6.25° W
Data source: IANA europe
Aliases: Eire
Rule groups: , GB-Eire, Eire

Geographic context

Where this clock belongs

The map marks the IANA reference location and associated country, not a time-zone boundary.

World location

Regional context

GPS reference: 53.33° N, 6.25° W. Associated countries: IE.

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.

1916–1995

Rule context

Summer Time Act, 1916

1971–2026

Rule context

In January 2018 we discovered that the negative SAVE values in the Eire rules cause problems with tests for ICU: and with tests for OpenJDK: To work around this problem, the build procedure can translate the following data into two forms, one with negative SAVE values and the other form with a traditional approximation for Irish timestamps after 1971-10-31 02:00 UTC; although this approximation has tm_isdst flags that are reversed, its UTC offsets are correct and this often suffices.... The following is like GB-Eire and EU, except with standard time in summer and negative daylight saving time in winter. It is for when negative SAVE values are used.

Original IANA source file: europe.

Civil-time record

Recorded changes over time

From 1880 to 2027 · 208 recorded transitions

Show period

Recurring daylight-saving changes are grouped separately when JavaScript is available.

Notable changes

One-off changes and transitions outside the recurring seasonal rhythm.

1880-08-02 00:00-00:25 · DMTStandard time applies
1916-05-21 03:00+00:34 · ISTDaylight saving time begins
1916-10-01 02:25+00:00 · GMTStandard time applies
1917-04-08 03:00+01:00 · BSTDaylight saving time begins
1917-09-17 02:00+00:00 · GMTStandard time applies
1918-03-24 03:00+01:00 · BSTDaylight saving time begins

Browse every recorded transition

Filter the table

Local time after transition	Offset after	Abbreviation	Rule
1880-08-02 00:00	-00:25	DMT	Standard time
1916-05-21 03:00	+00:34	IST	Daylight saving time
1916-10-01 02:25	+00:00	GMT	Standard time
1917-04-08 03:00	+01:00	BST	Daylight saving time
1917-09-17 02:00	+00:00	GMT	Standard time
1918-03-24 03:00	+01:00	BST	Daylight saving time
1918-09-30 02:00	+00:00	GMT	Standard time
1919-03-30 03:00	+01:00	BST	Daylight saving time
1919-09-29 02:00	+00:00	GMT	Standard time
1920-03-28 03:00	+01:00	BST	Daylight saving time
1920-10-25 02:00	+00:00	GMT	Standard time
1921-04-03 03:00	+01:00	BST	Daylight saving time
1921-10-03 02:00	+00:00	GMT	Standard time
1922-03-26 03:00	+01:00	IST	Daylight saving time
1922-10-08 02:00	+00:00	GMT	Standard time
1923-04-22 03:00	+01:00	IST	Daylight saving time
1923-09-16 02:00	+00:00	GMT	Standard time
1924-04-13 03:00	+01:00	IST	Daylight saving time
1924-09-21 02:00	+00:00	GMT	Standard time
1925-04-19 03:00	+01:00	IST	Daylight saving time
1925-10-04 02:00	+00:00	GMT	Standard time
1926-04-18 03:00	+01:00	IST	Daylight saving time
1926-10-03 02:00	+00:00	GMT	Standard time
1927-04-10 03:00	+01:00	IST	Daylight saving time
1927-10-02 02:00	+00:00	GMT	Standard time
1928-04-22 03:00	+01:00	IST	Daylight saving time
1928-10-07 02:00	+00:00	GMT	Standard time
1929-04-21 03:00	+01:00	IST	Daylight saving time
1929-10-06 02:00	+00:00	GMT	Standard time
1930-04-13 03:00	+01:00	IST	Daylight saving time
1930-10-05 02:00	+00:00	GMT	Standard time
1931-04-19 03:00	+01:00	IST	Daylight saving time
1931-10-04 02:00	+00:00	GMT	Standard time
1932-04-17 03:00	+01:00	IST	Daylight saving time
1932-10-02 02:00	+00:00	GMT	Standard time
1933-04-09 03:00	+01:00	IST	Daylight saving time
1933-10-08 02:00	+00:00	GMT	Standard time
1934-04-22 03:00	+01:00	IST	Daylight saving time
1934-10-07 02:00	+00:00	GMT	Standard time
1935-04-14 03:00	+01:00	IST	Daylight saving time
1935-10-06 02:00	+00:00	GMT	Standard time
1936-04-19 03:00	+01:00	IST	Daylight saving time
1936-10-04 02:00	+00:00	GMT	Standard time
1937-04-18 03:00	+01:00	IST	Daylight saving time
1937-10-03 02:00	+00:00	GMT	Standard time
1938-04-10 03:00	+01:00	IST	Daylight saving time
1938-10-02 02:00	+00:00	GMT	Standard time
1939-04-16 03:00	+01:00	IST	Daylight saving time
1939-11-19 02:00	+00:00	GMT	Standard time
1940-02-25 03:00	+01:00	IST	Daylight saving time
1946-10-06 02:00	+00:00	GMT	Standard time
1947-03-16 03:00	+01:00	IST	Daylight saving time
1947-11-02 02:00	+00:00	GMT	Standard time
1948-04-18 03:00	+01:00	IST	Daylight saving time
1948-10-31 02:00	+00:00	GMT	Standard time
1949-04-03 03:00	+01:00	IST	Daylight saving time
1949-10-30 02:00	+00:00	GMT	Standard time
1950-04-16 03:00	+01:00	IST	Daylight saving time
1950-10-22 02:00	+00:00	GMT	Standard time
1951-04-15 03:00	+01:00	IST	Daylight saving time
1951-10-21 02:00	+00:00	GMT	Standard time
1952-04-20 03:00	+01:00	IST	Daylight saving time
1952-10-26 02:00	+00:00	GMT	Standard time
1953-04-19 03:00	+01:00	IST	Daylight saving time
1953-10-04 02:00	+00:00	GMT	Standard time
1954-04-11 03:00	+01:00	IST	Daylight saving time
1954-10-03 02:00	+00:00	GMT	Standard time
1955-04-17 03:00	+01:00	IST	Daylight saving time
1955-10-02 02:00	+00:00	GMT	Standard time
1956-04-22 03:00	+01:00	IST	Daylight saving time
1956-10-07 02:00	+00:00	GMT	Standard time
1957-04-14 03:00	+01:00	IST	Daylight saving time
1957-10-06 02:00	+00:00	GMT	Standard time
1958-04-20 03:00	+01:00	IST	Daylight saving time
1958-10-05 02:00	+00:00	GMT	Standard time
1959-04-19 03:00	+01:00	IST	Daylight saving time
1959-10-04 02:00	+00:00	GMT	Standard time
1960-04-10 03:00	+01:00	IST	Daylight saving time
1960-10-02 02:00	+00:00	GMT	Standard time
1961-03-26 03:00	+01:00	IST	Daylight saving time
1961-10-29 02:00	+00:00	GMT	Standard time
1962-03-25 03:00	+01:00	IST	Daylight saving time
1962-10-28 02:00	+00:00	GMT	Standard time
1963-03-31 03:00	+01:00	IST	Daylight saving time
1963-10-27 02:00	+00:00	GMT	Standard time
1964-03-22 03:00	+01:00	IST	Daylight saving time
1964-10-25 02:00	+00:00	GMT	Standard time
1965-03-21 03:00	+01:00	IST	Daylight saving time
1965-10-24 02:00	+00:00	GMT	Standard time
1966-03-20 03:00	+01:00	IST	Daylight saving time
1966-10-23 02:00	+00:00	GMT	Standard time
1967-03-19 03:00	+01:00	IST	Daylight saving time
1967-10-29 02:00	+00:00	GMT	Standard time
1968-02-18 03:00	+01:00	IST	Daylight saving time
1968-10-27 00:00	+01:00	IST	Standard time
1971-10-31 02:00	+00:00	GMT	Daylight saving time
1972-03-19 03:00	+01:00	IST	Standard time
1972-10-29 02:00	+00:00	GMT	Daylight saving time
1973-03-18 03:00	+01:00	IST	Standard time
1973-10-28 02:00	+00:00	GMT	Daylight saving time
1974-03-17 03:00	+01:00	IST	Standard time
1974-10-27 02:00	+00:00	GMT	Daylight saving time
1975-03-16 03:00	+01:00	IST	Standard time
1975-10-26 02:00	+00:00	GMT	Daylight saving time
1976-03-21 03:00	+01:00	IST	Standard time
1976-10-24 02:00	+00:00	GMT	Daylight saving time
1977-03-20 03:00	+01:00	IST	Standard time
1977-10-23 02:00	+00:00	GMT	Daylight saving time
1978-03-19 03:00	+01:00	IST	Standard time
1978-10-29 02:00	+00:00	GMT	Daylight saving time
1979-03-18 03:00	+01:00	IST	Standard time
1979-10-28 02:00	+00:00	GMT	Daylight saving time
1980-03-16 03:00	+01:00	IST	Standard time
1980-10-26 02:00	+00:00	GMT	Daylight saving time
1981-03-29 02:00	+01:00	IST	Standard time
1981-10-25 01:00	+00:00	GMT	Daylight saving time
1982-03-28 02:00	+01:00	IST	Standard time
1982-10-24 01:00	+00:00	GMT	Daylight saving time
1983-03-27 02:00	+01:00	IST	Standard time
1983-10-23 01:00	+00:00	GMT	Daylight saving time
1984-03-25 02:00	+01:00	IST	Standard time
1984-10-28 01:00	+00:00	GMT	Daylight saving time
1985-03-31 02:00	+01:00	IST	Standard time
1985-10-27 01:00	+00:00	GMT	Daylight saving time
1986-03-30 02:00	+01:00	IST	Standard time
1986-10-26 01:00	+00:00	GMT	Daylight saving time
1987-03-29 02:00	+01:00	IST	Standard time
1987-10-25 01:00	+00:00	GMT	Daylight saving time
1988-03-27 02:00	+01:00	IST	Standard time
1988-10-23 01:00	+00:00	GMT	Daylight saving time
1989-03-26 02:00	+01:00	IST	Standard time
1989-10-29 01:00	+00:00	GMT	Daylight saving time
1990-03-25 02:00	+01:00	IST	Standard time
1990-10-28 01:00	+00:00	GMT	Daylight saving time
1991-03-31 02:00	+01:00	IST	Standard time
1991-10-27 01:00	+00:00	GMT	Daylight saving time
1992-03-29 02:00	+01:00	IST	Standard time
1992-10-25 01:00	+00:00	GMT	Daylight saving time
1993-03-28 02:00	+01:00	IST	Standard time
1993-10-24 01:00	+00:00	GMT	Daylight saving time
1994-03-27 02:00	+01:00	IST	Standard time
1994-10-23 01:00	+00:00	GMT	Daylight saving time
1995-03-26 02:00	+01:00	IST	Standard time
1995-10-22 01:00	+00:00	GMT	Daylight saving time
1996-03-31 02:00	+01:00	IST	Standard time
1996-10-27 01:00	+00:00	GMT	Daylight saving time
1997-03-30 02:00	+01:00	IST	Standard time
1997-10-26 01:00	+00:00	GMT	Daylight saving time
1998-03-29 02:00	+01:00	IST	Standard time
1998-10-25 01:00	+00:00	GMT	Daylight saving time
1999-03-28 02:00	+01:00	IST	Standard time
1999-10-31 01:00	+00:00	GMT	Daylight saving time
2000-03-26 02:00	+01:00	IST	Standard time
2000-10-29 01:00	+00:00	GMT	Daylight saving time
2001-03-25 02:00	+01:00	IST	Standard time
2001-10-28 01:00	+00:00	GMT	Daylight saving time
2002-03-31 02:00	+01:00	IST	Standard time
2002-10-27 01:00	+00:00	GMT	Daylight saving time
2003-03-30 02:00	+01:00	IST	Standard time
2003-10-26 01:00	+00:00	GMT	Daylight saving time
2004-03-28 02:00	+01:00	IST	Standard time
2004-10-31 01:00	+00:00	GMT	Daylight saving time
2005-03-27 02:00	+01:00	IST	Standard time
2005-10-30 01:00	+00:00	GMT	Daylight saving time
2006-03-26 02:00	+01:00	IST	Standard time
2006-10-29 01:00	+00:00	GMT	Daylight saving time
2007-03-25 02:00	+01:00	IST	Standard time
2007-10-28 01:00	+00:00	GMT	Daylight saving time
2008-03-30 02:00	+01:00	IST	Standard time
2008-10-26 01:00	+00:00	GMT	Daylight saving time
2009-03-29 02:00	+01:00	IST	Standard time
2009-10-25 01:00	+00:00	GMT	Daylight saving time
2010-03-28 02:00	+01:00	IST	Standard time
2010-10-31 01:00	+00:00	GMT	Daylight saving time
2011-03-27 02:00	+01:00	IST	Standard time
2011-10-30 01:00	+00:00	GMT	Daylight saving time
2012-03-25 02:00	+01:00	IST	Standard time
2012-10-28 01:00	+00:00	GMT	Daylight saving time
2013-03-31 02:00	+01:00	IST	Standard time
2013-10-27 01:00	+00:00	GMT	Daylight saving time
2014-03-30 02:00	+01:00	IST	Standard time
2014-10-26 01:00	+00:00	GMT	Daylight saving time
2015-03-29 02:00	+01:00	IST	Standard time
2015-10-25 01:00	+00:00	GMT	Daylight saving time
2016-03-27 02:00	+01:00	IST	Standard time
2016-10-30 01:00	+00:00	GMT	Daylight saving time
2017-03-26 02:00	+01:00	IST	Standard time
2017-10-29 01:00	+00:00	GMT	Daylight saving time
2018-03-25 02:00	+01:00	IST	Standard time
2018-10-28 01:00	+00:00	GMT	Daylight saving time
2019-03-31 02:00	+01:00	IST	Standard time
2019-10-27 01:00	+00:00	GMT	Daylight saving time
2020-03-29 02:00	+01:00	IST	Standard time
2020-10-25 01:00	+00:00	GMT	Daylight saving time
2021-03-28 02:00	+01:00	IST	Standard time
2021-10-31 01:00	+00:00	GMT	Daylight saving time
2022-03-27 02:00	+01:00	IST	Standard time
2022-10-30 01:00	+00:00	GMT	Daylight saving time
2023-03-26 02:00	+01:00	IST	Standard time
2023-10-29 01:00	+00:00	GMT	Daylight saving time
2024-03-31 02:00	+01:00	IST	Standard time
2024-10-27 01:00	+00:00	GMT	Daylight saving time
2025-03-30 02:00	+01:00	IST	Standard time
2025-10-26 01:00	+00:00	GMT	Daylight saving time
2026-03-29 02:00	+01:00	IST	Standard time
2026-10-25 01:00	+00:00	GMT	Daylight saving time
2027-03-28 02:00	+01:00	IST	Standard time
2027-10-31 01:00	+00:00	GMT	Daylight saving time