tzdata rule group
France
Historical rule context · 2 represented zones
A rule group describes recurring clock changes. It is not itself a place or an IANA time-zone identifier.
- First rule
- 1916
- Last rule
- 1976
- Rule entries
- 42
- Source files
- europe
Notes from the time database
Context for this rule
These source notes are preserved from tzdata. They help explain a rule’s period, without adding claims beyond the source.
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
Where it appears
Zones using France
Only historically distinct canonical zones from this atlas are listed.
Monaco
FranceOriginal rule fields
Recorded rule entries
Structured directly from tzdata’s Rule lines.
| From | To | Type | In | On | At | Save |
|---|---|---|---|---|---|---|
| 1916 | only | - | Jun | 14 | 23:00s | 1:00 |
| 1916 | 1919 | - | Oct | Sun>=1 | 23:00s | 0 |
| 1917 | only | - | Mar | 24 | 23:00s | 1:00 |
| 1918 | only | - | Mar | 9 | 23:00s | 1:00 |
| 1919 | only | - | Mar | 1 | 23:00s | 1:00 |
| 1920 | only | - | Feb | 14 | 23:00s | 1:00 |
| 1920 | only | - | Oct | 23 | 23:00s | 0 |
| 1921 | only | - | Mar | 14 | 23:00s | 1:00 |
| 1921 | only | - | Oct | 25 | 23:00s | 0 |
| 1922 | only | - | Mar | 25 | 23:00s | 1:00 |
| 1922 | 1938 | - | Oct | Sat>=1 | 23:00s | 0 |
| 1923 | only | - | May | 26 | 23:00s | 1:00 |
| 1924 | only | - | Mar | 29 | 23:00s | 1:00 |
| 1925 | only | - | Apr | 4 | 23:00s | 1:00 |
| 1926 | only | - | Apr | 17 | 23:00s | 1:00 |
| 1927 | only | - | Apr | 9 | 23:00s | 1:00 |
| 1928 | only | - | Apr | 14 | 23:00s | 1:00 |
| 1929 | only | - | Apr | 20 | 23:00s | 1:00 |
| 1930 | only | - | Apr | 12 | 23:00s | 1:00 |
| 1931 | only | - | Apr | 18 | 23:00s | 1:00 |
| 1932 | only | - | Apr | 2 | 23:00s | 1:00 |
| 1933 | only | - | Mar | 25 | 23:00s | 1:00 |
| 1934 | only | - | Apr | 7 | 23:00s | 1:00 |
| 1935 | only | - | Mar | 30 | 23:00s | 1:00 |
| 1936 | only | - | Apr | 18 | 23:00s | 1:00 |
| 1937 | only | - | Apr | 3 | 23:00s | 1:00 |
| 1938 | only | - | Mar | 26 | 23:00s | 1:00 |
| 1939 | only | - | Apr | 15 | 23:00s | 1:00 |
| 1939 | only | - | Nov | 18 | 23:00s | 0 |
| 1940 | only | - | Feb | 25 | 2:00 | 1:00 |
| 1941 | only | - | May | 5 | 0:00 | 2:00 |
| 1941 | only | - | Oct | 6 | 0:00 | 1:00 |
| 1942 | only | - | Mar | 9 | 0:00 | 2:00 |
| 1942 | only | - | Nov | 2 | 3:00 | 1:00 |
| 1943 | only | - | Mar | 29 | 2:00 | 2:00 |
| 1943 | only | - | Oct | 4 | 3:00 | 1:00 |
| 1944 | only | - | Apr | 3 | 2:00 | 2:00 |
| 1944 | only | - | Oct | 8 | 1:00 | 1:00 |
| 1945 | only | - | Apr | 2 | 2:00 | 2:00 |
| 1945 | only | - | Sep | 16 | 3:00 | 0 |
| 1976 | only | - | Mar | 28 | 1:00 | 1:00 |
| 1976 | only | - | Sep | 26 | 1:00 | 0 |