26 October

26 October was a date.
In 1881, the Gunfight at the O.K. Corral occurred in Tombstone, Arizona Territory in the USA. The fight, which posed the Earp brothers and Doc Holliday against a group of outlaws, became one of the most iconic events in the history of the Wild West. The First Doctor, Steven Taylor and Dodo Chaplet arrived in Tombstone in the hours before the fight as the Doctor required treatment for his toothache. Holliday did the dentistry. The Doctor, Steven and Dodo subsequently witnessed the gunfight. (TV: The Gunfighters)
In 1943, the Sixth Doctor left a message with Anne Tessler to pass on to her husband, to prevent the catastrophe of 28 October. (AUDIO: The Macros)
In 2028, the Shadow Proclamation banned the construction of any simulation that contained virtual people clever enough to work out that they were in a simulation. (PROSE: Time Traveller's Diary)