17 March 1942: birth of Ken Grieve, director of Destiny of the Daleks (Fourth Doctor, 1979)
17 March 2011: death of Michael Gough, who played the Toymaker in The Celestial Toymaker (First Doctor, 1966) and Hedin in Arc of Infinity (Fifth Doctor, 1983). He was also married to actress Anneke Wills.
ii) broadcast anniversary
17 March 1973: broadcast of fourth episode of Frontier in Space. The Master has the Doctor and Jo captive, but all three are captured by the Draconians.
iii) dates specified in-universe:
17 March 1898: death of Mary Eliza Millington in The Curse of Fenric (Seventh Doctor, 1989).
In 2010, an exhibit on Vincent van Gogh opened at the Musée d'Orsay, as seen in The Lodger (Eleventh Doctor, 2010).
Also, for the day that's in it, my guide to Ireland in Doctor Who written in 2019 (therefore missing last year).