29 July 1941: birth of David Warner, who played Professor Grisenko in Cold War (Eleventh Doctor, 2013) and voiced Lord Azlok in Dreamland (Tenth Doctor animated, 2009) as well as an alternative Doctor (and other parts) for Big Finish.
ii) broadcast anniversaries
29 July 2011: broadcast of Escape to L.A., fourth episode of Torchwood: Miracle Day. Team Torchwood arrive at the Pacific coast, and the plot thickens.
iii) date almost specified in canon
29 July 1977: first scenes of Image of the Fendahl (1977) as the hiker meets his doom and the scientists play with their pet skull. (Will give reasons for this dating on Friday.)
iii a) date of real event, almost but not quite specified in canon
29 July 1890: death of Vincent van Gogh