It had to happen eventually - that we would hit a date on which no episode of Doctor Who, or any of its spin-offs, has been broadcast for the first time.
There is one item we can mention, however. Thanks to all the additional material (usually on-line) which accompanies certain special episodes of the programme, we can state that Vastra Investigates was first made available on this date. This was a short mini-episode featuring the Paternoster Gang, which acted as a prequel to The Snowmen, 2012's Christmas Special.
The only other item of note is a Doctor Who themed edition of the quiz show Celebrity Eggheads, which was broadcast today in 2010. The Who team called themselves "Behind the Sofa", and comprised Colin Baker, Frazer Hines, Louise Jameson, John Leeson, and Katy Manning.
One of those odd little coincidences - today is the anniversary of the death of actor Walter Fitzgerald (in 1976, aged 80), who played the Dulcian leader Senex in The Dominators. Just yesterday I was watching the 1948 film version of The Winslow Boy - and there was something very familiar about the person playing the First Lord of the Admiralty. It was the 20 years younger Walter Fitzgerald.