French Guiana is not a colony or an overseas territory in the traditional sense. It is an integral department of France, with the same legal status as Normandy or Brittany, represented in the French National Assembly, using the euro, and covered by French law.
It also sits on the northeastern coast of South America, bordered by Brazil and Suriname, with a climate that is equatorial rainforest and a population of about 300,000 people.
The timezone is GFT (French Guiana Time), UTC-3, year-round, no DST. Paris is UTC+1 in winter and UTC+2 in summer, meaning French Guiana is always 4 or 5 hours behind the capital of the country it is formally part of.
The Space Centre and orbital mechanics
The Guiana Space Centre (CSG) in Kourou is why the world pays attention to French Guiana. It is the primary launch facility for European Space Agency missions, launching Ariane, Vega, and Soyuz rockets into orbit.
Kourou was chosen in the 1960s for a very specific reason: it sits at 5 degrees north latitude, close to the equator. Rockets launched from near the equator benefit enormously from the earth’s rotational velocity. At the equator, the earth’s surface is moving east at about 460 meters per second. A rocket launched from there gets that 460 m/s for free, reducing the fuel needed to achieve orbital velocity. A launch from Vandenberg in California or Baikonur in Kazakhstan means starting with less of that gravitational slingshot.
Every rocket launched from Kourou carries a UTC timestamp, because orbital mechanics requires precise synchronization with global timekeeping. The CSG has its own precision time infrastructure, and GFT (UTC-3) is the local administrative clock, but the actual countdown happens in UTC.
Devil’s Island
Before it was a spaceport, French Guiana was famous for its penal colonies. From 1852 to 1953, France transported convicts and political prisoners to Guiana. The most notorious facility was on Île du Diable (Devil’s Island), a small island off the coast.
Alfred Dreyfus, the French army officer wrongly convicted of treason in 1894 in the famous Dreyfus Affair, was imprisoned on Devil’s Island from 1895 to 1899. The Dreyfus Affair became a defining crisis of French politics and the role of the press, culminating in Émile Zola’s open letter “J’accuse” published in 1898.
The prison closed in 1953 and the ruins remain a historical site. The island sits in the same UTC-3 timezone as the rest of French Guiana, a small detail in a large history.
