Historically distinct IANA time zone
Europe/Monaco
Local time now
CEST · current offset
- Countries
- Monaco
- GPS reference
- 43.70° N, 7.38° E
- Data source
- IANA backzone
- Aliases
- None
MonacoGeographic context
Where this clock belongs
The map marks the IANA reference location and associated country, not a time-zone boundary.
GPS reference: 43.70° N, 7.38° E. Associated countries: MC.
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.
There is a curious history behind the erroneous date for the start of daylight saving in France in 1923 as listed in the current issues of the Annuaire du Bureau des Longitudes. [See:] Légifrance JORF No. 0073 du 15 mars 1922 Légifrance JORF No. 0139 du 25 mai 1923 The latter specifies March's last Saturday at 23:00 to October's first Saturday at 24:00, except that if neighboring allies agree the dates can be moved to April's third Saturday and September's third Saturday. Apparently spring 1923 was tricky. DISHO writes that in 1930, because of Easter, the transitions were Apr 12 and Oct 5. Use the 2020 Annuaire dates, except for spring 1923 where Shanks & Pottenger's May 26 matches the dates given in the 1924 and 1961-2001 issues of the Annuaire.
Midsummer
The following rules are for the European Union and for its predecessor organization, the European Communities. For brevity they are called "EU rules" elsewhere in this file.
Original IANA source file: europe.
A shared present
Same clock today, different past
These nearby zones follow the same current annual pattern, yet retain their own historical record.
San Marino · 409 km from the reference location · Same annual clock since 1980
Liechtenstein · 418 km from the reference location · Same annual clock since 1981
Switzerland · 419 km from the reference location · Same annual clock since 1981Civil-time record
Recorded changes over time
From 1891 to 2027 · 164 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.
- +00:09 · PMTStandard time applies
- +00:00 · WETStandard time applies
- +01:00 · WESTDaylight saving time begins
- +00:00 · WETStandard time applies
- +01:00 · WESTDaylight saving time begins
- +00:00 · WETStandard time applies
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1891-03-16 00:00 | +00:09 | PMT | Standard time |
| 1911-03-10 23:50 | +00:00 | WET | Standard time |
| 1916-06-15 00:00 | +01:00 | WEST | Daylight saving time |
| 1916-10-01 23:00 | +00:00 | WET | Standard time |
| 1917-03-25 00:00 | +01:00 | WEST | Daylight saving time |
| 1917-10-07 23:00 | +00:00 | WET | Standard time |
| 1918-03-10 00:00 | +01:00 | WEST | Daylight saving time |
| 1918-10-06 23:00 | +00:00 | WET | Standard time |
| 1919-03-02 00:00 | +01:00 | WEST | Daylight saving time |
| 1919-10-05 23:00 | +00:00 | WET | Standard time |
| 1920-02-15 00:00 | +01:00 | WEST | Daylight saving time |
| 1920-10-23 23:00 | +00:00 | WET | Standard time |
| 1921-03-15 00:00 | +01:00 | WEST | Daylight saving time |
| 1921-10-25 23:00 | +00:00 | WET | Standard time |
| 1922-03-26 00:00 | +01:00 | WEST | Daylight saving time |
| 1922-10-07 23:00 | +00:00 | WET | Standard time |
| 1923-05-27 00:00 | +01:00 | WEST | Daylight saving time |
| 1923-10-06 23:00 | +00:00 | WET | Standard time |
| 1924-03-30 00:00 | +01:00 | WEST | Daylight saving time |
| 1924-10-04 23:00 | +00:00 | WET | Standard time |
| 1925-04-05 00:00 | +01:00 | WEST | Daylight saving time |
| 1925-10-03 23:00 | +00:00 | WET | Standard time |
| 1926-04-18 00:00 | +01:00 | WEST | Daylight saving time |
| 1926-10-02 23:00 | +00:00 | WET | Standard time |
| 1927-04-10 00:00 | +01:00 | WEST | Daylight saving time |
| 1927-10-01 23:00 | +00:00 | WET | Standard time |
| 1928-04-15 00:00 | +01:00 | WEST | Daylight saving time |
| 1928-10-06 23:00 | +00:00 | WET | Standard time |
| 1929-04-21 00:00 | +01:00 | WEST | Daylight saving time |
| 1929-10-05 23:00 | +00:00 | WET | Standard time |
| 1930-04-13 00:00 | +01:00 | WEST | Daylight saving time |
| 1930-10-04 23:00 | +00:00 | WET | Standard time |
| 1931-04-19 00:00 | +01:00 | WEST | Daylight saving time |
| 1931-10-03 23:00 | +00:00 | WET | Standard time |
| 1932-04-03 00:00 | +01:00 | WEST | Daylight saving time |
| 1932-10-01 23:00 | +00:00 | WET | Standard time |
| 1933-03-26 00:00 | +01:00 | WEST | Daylight saving time |
| 1933-10-07 23:00 | +00:00 | WET | Standard time |
| 1934-04-08 00:00 | +01:00 | WEST | Daylight saving time |
| 1934-10-06 23:00 | +00:00 | WET | Standard time |
| 1935-03-31 00:00 | +01:00 | WEST | Daylight saving time |
| 1935-10-05 23:00 | +00:00 | WET | Standard time |
| 1936-04-19 00:00 | +01:00 | WEST | Daylight saving time |
| 1936-10-03 23:00 | +00:00 | WET | Standard time |
| 1937-04-04 00:00 | +01:00 | WEST | Daylight saving time |
| 1937-10-02 23:00 | +00:00 | WET | Standard time |
| 1938-03-27 00:00 | +01:00 | WEST | Daylight saving time |
| 1938-10-01 23:00 | +00:00 | WET | Standard time |
| 1939-04-16 00:00 | +01:00 | WEST | Daylight saving time |
| 1939-11-18 23:00 | +00:00 | WET | Standard time |
| 1940-02-25 03:00 | +01:00 | WEST | Daylight saving time |
| 1940-06-15 00:00 | +02:00 | CEST | Daylight saving time |
| 1942-11-02 02:00 | +01:00 | CET | Standard time |
| 1943-03-29 03:00 | +02:00 | CEST | Daylight saving time |
| 1943-10-04 02:00 | +01:00 | CET | Standard time |
| 1944-04-03 03:00 | +02:00 | CEST | Daylight saving time |
| 1944-08-25 00:00 | +02:00 | WEMT | Daylight saving time |
| 1944-10-08 00:00 | +01:00 | WEST | Daylight saving time |
| 1945-04-02 03:00 | +02:00 | WEMT | Daylight saving time |
| 1945-09-16 02:00 | +01:00 | CET | Standard time |
| 1976-03-28 02:00 | +02:00 | CEST | Daylight saving time |
| 1976-09-26 00:00 | +01:00 | CET | Standard time |
| 1977-04-03 03:00 | +02:00 | CEST | Daylight saving time |
| 1977-09-25 02:00 | +01:00 | CET | Standard time |
| 1978-04-02 03:00 | +02:00 | CEST | Daylight saving time |
| 1978-10-01 02:00 | +01:00 | CET | Standard time |
| 1979-04-01 03:00 | +02:00 | CEST | Daylight saving time |
| 1979-09-30 02:00 | +01:00 | CET | Standard time |
| 1980-04-06 03:00 | +02:00 | CEST | Daylight saving time |
| 1980-09-28 02:00 | +01:00 | CET | Standard time |
| 1981-03-29 03:00 | +02:00 | CEST | Daylight saving time |
| 1981-09-27 02:00 | +01:00 | CET | Standard time |
| 1982-03-28 03:00 | +02:00 | CEST | Daylight saving time |
| 1982-09-26 02:00 | +01:00 | CET | Standard time |
| 1983-03-27 03:00 | +02:00 | CEST | Daylight saving time |
| 1983-09-25 02:00 | +01:00 | CET | Standard time |
| 1984-03-25 03:00 | +02:00 | CEST | Daylight saving time |
| 1984-09-30 02:00 | +01:00 | CET | Standard time |
| 1985-03-31 03:00 | +02:00 | CEST | Daylight saving time |
| 1985-09-29 02:00 | +01:00 | CET | Standard time |
| 1986-03-30 03:00 | +02:00 | CEST | Daylight saving time |
| 1986-09-28 02:00 | +01:00 | CET | Standard time |
| 1987-03-29 03:00 | +02:00 | CEST | Daylight saving time |
| 1987-09-27 02:00 | +01:00 | CET | Standard time |
| 1988-03-27 03:00 | +02:00 | CEST | Daylight saving time |
| 1988-09-25 02:00 | +01:00 | CET | Standard time |
| 1989-03-26 03:00 | +02:00 | CEST | Daylight saving time |
| 1989-09-24 02:00 | +01:00 | CET | Standard time |
| 1990-03-25 03:00 | +02:00 | CEST | Daylight saving time |
| 1990-09-30 02:00 | +01:00 | CET | Standard time |
| 1991-03-31 03:00 | +02:00 | CEST | Daylight saving time |
| 1991-09-29 02:00 | +01:00 | CET | Standard time |
| 1992-03-29 03:00 | +02:00 | CEST | Daylight saving time |
| 1992-09-27 02:00 | +01:00 | CET | Standard time |
| 1993-03-28 03:00 | +02:00 | CEST | Daylight saving time |
| 1993-09-26 02:00 | +01:00 | CET | Standard time |
| 1994-03-27 03:00 | +02:00 | CEST | Daylight saving time |
| 1994-09-25 02:00 | +01:00 | CET | Standard time |
| 1995-03-26 03:00 | +02:00 | CEST | Daylight saving time |
| 1995-09-24 02:00 | +01:00 | CET | Standard time |
| 1996-03-31 03:00 | +02:00 | CEST | Daylight saving time |
| 1996-10-27 02:00 | +01:00 | CET | Standard time |
| 1997-03-30 03:00 | +02:00 | CEST | Daylight saving time |
| 1997-10-26 02:00 | +01:00 | CET | Standard time |
| 1998-03-29 03:00 | +02:00 | CEST | Daylight saving time |
| 1998-10-25 02:00 | +01:00 | CET | Standard time |
| 1999-03-28 03:00 | +02:00 | CEST | Daylight saving time |
| 1999-10-31 02:00 | +01:00 | CET | Standard time |
| 2000-03-26 03:00 | +02:00 | CEST | Daylight saving time |
| 2000-10-29 02:00 | +01:00 | CET | Standard time |
| 2001-03-25 03:00 | +02:00 | CEST | Daylight saving time |
| 2001-10-28 02:00 | +01:00 | CET | Standard time |
| 2002-03-31 03:00 | +02:00 | CEST | Daylight saving time |
| 2002-10-27 02:00 | +01:00 | CET | Standard time |
| 2003-03-30 03:00 | +02:00 | CEST | Daylight saving time |
| 2003-10-26 02:00 | +01:00 | CET | Standard time |
| 2004-03-28 03:00 | +02:00 | CEST | Daylight saving time |
| 2004-10-31 02:00 | +01:00 | CET | Standard time |
| 2005-03-27 03:00 | +02:00 | CEST | Daylight saving time |
| 2005-10-30 02:00 | +01:00 | CET | Standard time |
| 2006-03-26 03:00 | +02:00 | CEST | Daylight saving time |
| 2006-10-29 02:00 | +01:00 | CET | Standard time |
| 2007-03-25 03:00 | +02:00 | CEST | Daylight saving time |
| 2007-10-28 02:00 | +01:00 | CET | Standard time |
| 2008-03-30 03:00 | +02:00 | CEST | Daylight saving time |
| 2008-10-26 02:00 | +01:00 | CET | Standard time |
| 2009-03-29 03:00 | +02:00 | CEST | Daylight saving time |
| 2009-10-25 02:00 | +01:00 | CET | Standard time |
| 2010-03-28 03:00 | +02:00 | CEST | Daylight saving time |
| 2010-10-31 02:00 | +01:00 | CET | Standard time |
| 2011-03-27 03:00 | +02:00 | CEST | Daylight saving time |
| 2011-10-30 02:00 | +01:00 | CET | Standard time |
| 2012-03-25 03:00 | +02:00 | CEST | Daylight saving time |
| 2012-10-28 02:00 | +01:00 | CET | Standard time |
| 2013-03-31 03:00 | +02:00 | CEST | Daylight saving time |
| 2013-10-27 02:00 | +01:00 | CET | Standard time |
| 2014-03-30 03:00 | +02:00 | CEST | Daylight saving time |
| 2014-10-26 02:00 | +01:00 | CET | Standard time |
| 2015-03-29 03:00 | +02:00 | CEST | Daylight saving time |
| 2015-10-25 02:00 | +01:00 | CET | Standard time |
| 2016-03-27 03:00 | +02:00 | CEST | Daylight saving time |
| 2016-10-30 02:00 | +01:00 | CET | Standard time |
| 2017-03-26 03:00 | +02:00 | CEST | Daylight saving time |
| 2017-10-29 02:00 | +01:00 | CET | Standard time |
| 2018-03-25 03:00 | +02:00 | CEST | Daylight saving time |
| 2018-10-28 02:00 | +01:00 | CET | Standard time |
| 2019-03-31 03:00 | +02:00 | CEST | Daylight saving time |
| 2019-10-27 02:00 | +01:00 | CET | Standard time |
| 2020-03-29 03:00 | +02:00 | CEST | Daylight saving time |
| 2020-10-25 02:00 | +01:00 | CET | Standard time |
| 2021-03-28 03:00 | +02:00 | CEST | Daylight saving time |
| 2021-10-31 02:00 | +01:00 | CET | Standard time |
| 2022-03-27 03:00 | +02:00 | CEST | Daylight saving time |
| 2022-10-30 02:00 | +01:00 | CET | Standard time |
| 2023-03-26 03:00 | +02:00 | CEST | Daylight saving time |
| 2023-10-29 02:00 | +01:00 | CET | Standard time |
| 2024-03-31 03:00 | +02:00 | CEST | Daylight saving time |
| 2024-10-27 02:00 | +01:00 | CET | Standard time |
| 2025-03-30 03:00 | +02:00 | CEST | Daylight saving time |
| 2025-10-26 02:00 | +01:00 | CET | Standard time |
| 2026-03-29 03:00 | +02:00 | CEST | Daylight saving time |
| 2026-10-25 02:00 | +01:00 | CET | Standard time |
| 2027-03-28 03:00 | +02:00 | CEST | Daylight saving time |
| 2027-10-31 02:00 | +01:00 | CET | Standard time |