22 November 1920: birth of Paul Erickson, author of The Ark (1966).
22 November 2007: death of Verity Lambert, the very first producer of Doctor Who (1963-65).
ii) broadcast and webcast anniversaries
22 November 1975: broadcast of first episode of The Android Invasion. The Doctor and Sarah arrive at the village of Devesham, to find peculiar behaviour from the villagers, a lost astronaut and sinister guards in white suits.
22 November 1980: broadcast of first episode of State of Decay. The Doctor and Romana explore a very low-tech village, and are attacked by bats.
22 November 1985: Children in Need features four Doctors and fifteen companions.
22 November 1986: broadcast of fourth episode of Terror of the Vervoids (ToaTL #12). The Doctor kills off the Vervoids and is accused of genocide.
22 November 1989: broadcast of first episode of Survival. The Doctor brings Ace back to Privale, where a black cat is transporting people to another world, wheret he Doctor meets the Master.
22 November 2009: release of second episode of Dreamland.
iii) date specified in canon
22 November 1963: assassination of John F. Kennedy, as described in Who Killed Kennedy? by David Bishop, and apparently witnessed by the Ninth Doctor according to Clive's research in Rose (2005).