Birthday

Birthdays in the 31st century are much like the birthdays celebrated 1000 years ago. The words to the birthday song have changed, and the tune is similar but legally distinct.

Birthday Cake
Of course a cake is traditional to have at a Birthday. Some characters like Nibbler and Amy have large cakes whilst others like Dr. Zoidberg get only a small cupcake.

The Birthday Song
What day is today?

It's _____'s birthday,

What a day for a birthday,

Let's all have some cake

Appearances

 * "I Second that Emotion" (2ACV01): Nibbler's birthday
 * "A Clone of My Own" (2ACV10): Professor Hubert J. Farnsworth's birthday
 * "How Hermes Requisitioned His Groove Back" (2ACV11): Hermes' 10th birthday party is mentioned
 * "Time Keeps on Slipping" (3ACV14): both Amy's and Zoidberg's birthdays
 * "Leela's Homeworld" (4ACV02): Teenage Leela's birthday
 * "Bender Should Not Be Allowed on Television" (4ACV06): Calculon's fictional birthday on All My Circuits, Dwight's birthday, and Cubert Farnsworth's Growth-Scraping Day (which is effectively his birthday)
 * "Teenage Mutant Leela's Hurdles" (4ACV09): The crew's ages keep reducing causing them to go back to many of their birthdays. Amy is shown when her 8th birthday is.