Did you remember to prepare your Life Day robes? (Photo: JD Hancock/CC BY 2.0)

Attention Atlas readers! We need your help to create the definitive calendar of holidays that are celebrated by the characters in your favorite books, TV shows, movies, and beyond.

Did you forget to honor the First Contact Day on April 5th, along with the Star Trek universe? How about Harry Potter Day on May 2nd, honoring the date that the Boy Who Lived finally defeated Voldemort? With our upcoming calendar of fictional holidays, you’ll never miss another Festivus, but we need your help. Please fill out the form below, and tell us about the fictional holidays you don’t want to miss! 

We’ll be taking submissions until next Friday, May 13th, so let’s start celebrating.