Template:On this day/April

• 1857: Ruggero Leoncavallo, composer, was born.
• 1939: Patrick Williams, composer, was born.
• 1953: Richard Joseph, music engineer, was born.
• 1954: Michael Moore, author and guest star, was born.
• 1957: Jan Hooks, actress and recurring guest star, was born.
• 1977: John Oliver, comedian and guest star, was born.
• 1989: "Family Therapy" aired for the first time.
• 1992: "The Otto Show" aired for the first time.
• 2002: I Am Not Homer was released.
• 2006: "The Wettest Stories Ever Told" aired for the first time.
• 2018: Arthur B. Rubinstein, music composer, died.