39th century

In the 39th century, the Galactic Federation was in power. (PROSE: Legacy)

Jack Harkness had a relationship with a proto-humanoid Gloobi hybrid in the wastes of Tarsius in the 39th century. (PROSE: Only Human)

The Fourth Doctor obtained a particulate vacuum cleaner in Brazil during the 39th century. (AUDIO: The Fate of Krelos)