"No, not to our knowledge -- certainly not in the main three films," Clockwork confirms. "I think George is the only one to get a canonical birthday in those. And yes, I know the John Lithgow story -- and really? How curious -- but they wouldn't have chosen a date for them to go to the future until they were sure they were doing a sequel, and by that time Christopher Lloyd was definitely Doc. Remember, the ending to Part I was originally a joke."

"I guess it depends more on if Chris ever even mentioned it," VampDoc2 says. "Makes you wonder if they celebrated any birthdays on-set."

"Would have liked to have seen that," Vic chuckles.