I could say it was in the episode "The Best Day Ever" but it wasn't so good for him. I could also say it might be in the episode "F.U.N" but he was betrayed.
So It'd probably be in the first episode where he gets his job at the Krusty Krab.
You probably mean Spongebob Squarepants: 10 Happiest Moments, a DVD that was made to commemorate Spongebob's 10th anniversary.
The cast of The Happiest Day of the Year - 2013 includes: Meghann Lee
graduation day! :D
The Chevy Show - 1959 Happiest Day was released on: USA: 23 April 1961
Noon
No it doesn't
Playhouse 90 - 1956 The Second Happiest Day - 3.38 was released on: USA: 25 June 1959
The happiest moment in the Harry Potter series is probably the day Voldemort dies but it is different for each person.
YOUR MAMAS BIRTHDAY THAT RIGHT U jk babe
Spongebob is on every day, for sure 7:30.
The Best Day Ever in the episode of it
He took a day off (and went insane)