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On 12月22日, a number of things set in or relevant to the Doctor Who universe were released or published.
- 1973 - Episode two of The Time Warrior was first broadcast on BBC1.
- 1973 - Part two of the TV Comic story The Amateur was first published.
- 1979 - Part one of The Horns of Nimon was first broadcast on BBC1.
- 1994 - DWM 221 was first released by Marvel Comics.
- 2007 - Chute! special was first broadcast on CBBC.
- 2007 - The Hopes and Fears of All the Years was published in the Daily Telegraph.
- 2010 - Shadows of the Vashta Nerada was first released by BBC Wales Interactive.
- 2017 - O Tannenbaum was first released by Big Finish Productions.
- 2020 - The Shattered Hourglass was first released by Big Finish.