Bill the Cosby is a fake holiday that Murr tried to get people to sign a petition for so that it would become a real holiday.
In the ChallengeEdit
In the season three episode, Snow Way Out, Joe and Murr had to get people to legalize fake holidays to make them official. He did not get the woman to sign his form for "Bill the Cosby" to be a holiday. He got a loss on this challenge.