39th century

In the 39th century, the Galactic Federation was in power. (PROSE: Legacy)
The Second Great and Bountiful Human Empire arrived on the Ood Sphere in the 39th century and enslaved them. (TV: Planet of the Ood)
The Fifth Doctor, Adric and Tegan visited the planet Deva Loka in the mid-39th century, where they encounter the Mara. (TV: Kinda)
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)
By the 39th century, heavy deforestation was carried out on Kepzyr. (PROSE: Frank Reade, Jr.'s Electric Time Canoe)