"[from trailer] 1 day, and 15 years ago, everything changed. We was covered in this ooze someone dumped in the sewers. Whatever this ooze was, it transformed us. It was weird, but we became a family."
January 1, 1970
https://en.wikiquote.org/wiki/Teenage_Mutant_Ninja_Turtles%3A_Mutant_Mayhem