2109

2109 was a year.

An alien intelligence invaded the Interstitial Mass Transit System. It was defeated by the Seventh Doctor and Kadiatu Lethbridge-Stewart. (PROSE: Transit)

2109 was, according to the Eleventh Doctor, the year in which the major events of the film Independence Day actually took place. The Doctor's revelation meant that the film was a work of predictive fiction. (PROSE: Heart of Stone)

Professor Egen briefly stopped in 2109 during his journey through history starting from 1959. However, he found that the cities of 2109 were disappointingly similar to those of his previous stop, 2009, prompting him to hop forward two centuries, to 2309, for his next trip. (COMIC: Dr. Who's Time Tales)