Unbirthday

Mad Hatter: Now statistics prove, prove that you’ve one birthday.
March Hare: Imagine, just one birthday every year.
Mad Hatter: Ahhh, but there are 364 unbirthdays!
March Hare: Precisely why we’re gathered here to cheer!
Alice: Why, then today is my unbirthday too!
March Hare: It is?
Mad Hatter: What a small world this is.

—Alice’s Adventures in Wonderland

A Very Merry Unbirthday to You! (yes, you)