1918

1918 was the year of a major flu epidemic, (TV: The Unicorn and the Wasp; AUDIO: The White Room) which carried over to 1919, killing more people than World War I had. (PROSE: The Clockwise Man) Colonel Hugh Curbishley caught it, and was "never the same" again. (TV: The Unicorn and the Wasp)

Dated events
In Roma I, this year was written as MMDCLXI. On 8 Januarius, Marcus Americanius Scriptor was born and the old man appeared in the Roman Forum. (PROSE: Warlords of Utopia)

Russia changed from the Julian to Gregorian calendar, skipping the days 1 February through 13 February. Cousin Anastasia incorporated these days into the Thirteen-Day Republic. (PROSE: The Book of the War)

The Eighth Doctor visited the North Yorkshire village of Hawkswick. On 19 March, John Sykes was murdered. (PROSE: Casualties of War)

On 11 November, World War I ended with Armistice Day, (AUDIO: The White Room) beginning a postwar period which ended with the beginning of World War II in 1939. (PROSE: A History of Humankind)

Undated events
Gerald Carter and Harriet Derbyshire investigated a temporal phenomenon for Torchwood Three in Cardiff. A future version of Tommy Brockless told them to freeze his present self in the hospital to be awakened later. The future Tommy, his mind in shell shock, returned to this time not long after, with Toshiko Sato reminding him from the 21st century to turn the "rift key" he had been given to stop the two time zones from collapsing on one another. (TV: To the Last Man)

In the United Kingdom, certain women over thirty gained the right to vote in the aftermath of World War I. (AUDIO: The Suffering)