The Happy Birthday song was originally a Good Morning song written in the late 1800s by two sister kindergarten teachers,

The Happy Birthday song was originally a Good Morning song written
in the late 1800s by two sister kindergarten teachers, Mildred & Patty
Hill, for their students. Anyone who uses the Happy Birthday song
in a production has to credit the Hill sisters.

Related:

• Patty: Hello, everybody except Homer. Jackie: [touching Maggie's nose] Happy birthday,
  granddaughter. Patty: Marge, I think that's your father...
• to the tune of the Colonel Bogey March] Lisa, her teeth are big and green.
  Lisa, she smells like gasoline. Lisa, da da da Disa...
• Smithers: Here are several fine young men who I'm sure are gonna go far.
  Ladies and gentlemen, the Ramones! Burns: Ah, these...
• Good morning. My name is HAL. My instructors name is Dr.
  Chandraseknasar. He has taught me to sing a song....
• Abortion means never having to say "Happy
  Birthday...
• At the close of the day when the hamlet is still, And mortals the sweets of forgetfulness prove,
  When naught but the torrent is heard on the hill, And...
• cause anyone who would buy this record couldn't give a fuck if there's good musicians on it.
  'cause this is a STUPID song... ...AND THAT'S THE WAY...
• Abstain from wine, women, and song;
  mostly song...
• Freddy approaches two people tossing a football] Freddy:
  Gimme the ball! [runs to the punch bowl, throws...