Thread:InfernoxStudios/@comment-38811136-20190314201924/@comment-5648207-20190316183045

The birthday’s either come from the episode air date itself in which the birthday took place (Tommy for example, August 11), Phil and Lil’s were mentioned in a nick magazine, Chuckie’s was calculated from information in All Grown Up, so on so forth. Using information from what the show gives us in canon basically was used to this interpretation.