Question: On what day of what month did the episode of "SpongeBob SquarePants" first air in which there first appeared the character voiced by an actor who also played Michael "Dauber" Dybinski on the sitcom "Coach"?
Sentence (from "Patrick Star"): Created and designed by marine biologist and cartoonist Stephen Hillenburg, the series creator, Patrick first appeared on television in the show's pilot episode "Help Wanted" on May 1, 1999.
Relevant evidence: Yes