SpongeBob SquarePants (1999)

S1E38 Fools in April

Title: April Shenanigans Plot: Squidward awakens to the realization that it's April Fools Day, a day SpongeBob eagerly anticipates each year. Fearing that SpongeBob will pull a prank on him, Squidward becomes increasingly anxious. In an attempt to get even, he decides to prank SpongeBob, but the plan backfires when SpongeBob ends up heartbroken and rushes home in tears. Faced with guilt, Squidward realizes he must make amends and apologize to his friend.