i) births and deaths
8 January 1908: they don’t get more fundamental than this: birth of William Hartnell, who played the First Doctor from 1963 to 1966, and returned for The Three Doctors in 1972-73.
ii) broadcast anniversaries
8 January 1971: broadcast of second episode of Day of the Daleks. Jo is captured and brought to the 22nd Century; the Doctor is confronted by a Dalek emerging from the time vortex.
8 January 1977: broadcast of second episode of The Face of Evil. The Doctor passes the Test of the Horda; Xoanon unleashes the invisible monsters on the Sevateem.
Unrelated, but is there any possibility that you could easily help with this? Someone close to Dan has just had a child diagnosed and they are struggling. No worries at all if not – I’m sure you must get this kind of request all the time.