The BBC have now revealed the title and details for the Doctor Who 2013 Christmas special. The episode, which is Matt Smith's final as The Doctor, will indeed be entitled The Time of the Doctor and will air on Christmas Day on BBC One, time to be confirmed.
I have to say, it is not as very imaginative title now is it. I'd have put money on it being The Fall Of The Eleventh, which is a far better title.
Orbiting a quiet backwater planet, the massed forces of the universe’s deadliest species gather, drawn to a mysterious message that echoes out to the stars. And amongst them – the Doctor. Rescuing Clara from a family Christmas dinner, the Time Lord and his best friend must learn what this enigmatic signal means for his own fate and that of the universe.