1641

1641 was a year.

Off the coast of Africa, an experimental time ship from the 47th century crashed into the Flying Dutchman. The robot crew of the time ship fixed the Dutchman with technology from their ship and began to believe that they were the original crew of the Dutchman.

When the Twelfth Doctor needed to convince the robots that they were not the original crew of the Flying Dutchman, he took them back to 1641, where they saw themselves crash into the Flying Dutchman. (COMIC: Ghosts of the Seas)

London held a frost fair. The Twelfth Doctor and Clara Oswald tried to visit this fair, but ended up in 1941. (COMIC: The Instruments of War)

The Star Chamber was officially abolished by King Charles I. However, it continued to act as a court for the Society of St George. (PROSE: The Book of the War)