Anniversary
From Tardis Wiki, the free Doctor Who reference
An anniversary was a date on which a prior event was commemorated. A type of anniversary was a wedding anniversary. (TV: The Power of Three)
Behind the scenes
The anniversary of Doctor Who, which began with the first episode of An Unearthly Child on 23 November 1963, has been commemorated on several occasions.
- The 20th anniversary of Doctor Who was commemorated with the broadcast of The Five Doctors on 23 November 1983.