Groundhog Day

Groundhog Day was an expression used by both Rose Tyler and the Seventh Doctor to indicate the experience of being caught in a time loop. (DWM: Interstellar Overdrive, BFA: No Man's Land)

Behind the scenes
Though the fact that "Groundhog Day" is both and  in the United States of America goes unremarked in DWU fiction, its usage presupposes audience exposure to the Bill Murray film of the same name. In that film, Murray's character is caught in a loop and forced to live the events of one particular Groundhog Day over and over again.