VE Day
From Tardis Wiki, the free Doctor Who reference
VE Day - which stood for Victory In Europe - marked the Allies' victory over Nazi Germany in World War II and took place on 8 May 1945. A major celebration took place in Trafalgar Square in London. (PROSE: Magic of the Angels)
The Seventh Doctor and his companions Ace and Hex were present in London for the celebrations. Prior to this visit, Hex had never heard of VE Day. (AUDIO: Casualties of War)