Holidays in French Southern Territories

Official national public holidays. Regional and religious observances may vary by area.

About Time in French Southern Territories

One Administration Runs on Four Different Legal Clocks

The French Southern and Antarctic Lands are not a single time zone. French Decree No. 2017-292 assigns four separate legal offsets inside the territory: Amsterdam, Saint-Paul and Kerguelen use UTC+5; Crozet uses UTC+4; Bassas da India, Europa, Glorieuses, Juan da Nova and Tromelin use UTC+3; Terre Adélie uses UTC+10.

That creates a seven-hour legal spread inside one overseas territory. When it is noon on Europa or Juan da Nova, it is 13:00 at Alfred-Faure on Crozet, 14:00 at Port-aux-Français on Kerguelen and 19:00 at Dumont-d'Urville in Antarctica.

The administrative center adds another layer. TAAF headquarters has been based in Saint-Pierre on Réunion since 2000. Réunion itself is legally UTC+4, so headquarters shares its clock with Crozet, operates one hour behind Kerguelen and Amsterdam, one hour ahead of the Îles Éparses, and six hours behind Terre Adélie.

The four-offset arrangement was written explicitly into the 2017 French legal-time decree. Its impact assessment states that one purpose of the reform was to define legal time in the TAAF while replacing older French time legislation whose overseas provisions needed updating. The same decree ties all of these local clocks to UTC as realized within the French metrology system by the Observatoire de Paris.

Crozet Is So Far From Dubai That tzdb Uses Dubai Anyway

The software view of the territory looks nothing like its administrative map. In IANA's current zone1970.tab, Crozet is associated with Asia/Dubai. Kerguelen, Saint-Paul and Amsterdam are grouped with Indian/Maldives. The old name Indian/Kerguelen still exists for compatibility, but current tzdb links it to the Maldives zone.

This is deliberate rather than an error in geography. IANA's own theory document uses Crozet as an explicit example of why it does not create a separate zone such as Indian/Crozet when clocks have agreed with another zone throughout the database's main post-1970 period. Crozet and Dubai can therefore share one tzdb history even though they are thousands of kilometers apart and belong to entirely different jurisdictions.

Terre Adélie is handled differently again. The practical identifier is Antarctica/DumontDUrville, and tzdb's country tables associate Antarctic stations with the AQ code rather than reproducing France's TAAF administrative structure. The database documentation explicitly says those tables are not intended to endorse territorial claims. A legal map of the TAAF and a tzdb map of equivalent clocks are therefore answering different questions.

The Antarctic Archive Exposes a Problem in the Old Dumont-d'Urville Reconstruction

IANA's optional backzone file contains an old reconstruction for Antarctica/DumontDUrville. Its comments say that Port-Martin began operation in 1947, was destroyed by fire on January 14, 1952, and that the zone returned to UTC+10 in November 1956. The file itself warns that backzone material is outside tzdb's normal historical scope and is less reliable than its post-1970 data.

The official TAAF historical record gives a different chronology. It says the relief team arrived at Port-Martin on January 14, 1952, but the fire that destroyed the main building occurred during the night of January 23 to 24. Seven men then wintered at the secondary Base Marret on Île des Pétrels, and that temporary observatory closed in January 1953. A permanent Dumont-d'Urville base was constructed on the same island in 1956; TAAF material marking its seventieth anniversary states that it entered service in April 1956.

Those records make the exact pre-1957 tzdb boundaries unsuitable as a literal chronology of French Antarctic occupation. January 14 is documented by TAAF as an arrival date, not the date of the Port-Martin fire, and French personnel continued keeping an Antarctic station after the fire at Base Marret. For historical timestamps from this period, the official expedition chronology is stronger evidence than the old backzone cutoffs.

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