54th century

The Eleventh Doctor found himself in the year 5345 in the 54th century after passing through a portal on Earth in 1941. (TV: The Doctor, the Widow and the Wardrobe)

The Twelfth Doctor visited Mendorax Dellora in 5343. (TV: The Husbands of River Song)

Humanity was confined to Mutter's Spiral until the discovery of the intergalactic drive in the 54th century. (AUDIO: The Star Men)