Anything you can think of, we bet it has a day dedicated to it. For example, today is —checks notes — National Blueberry Cheesecake Day and World Dracula Day. Indeed, most are dubious in origin and officialdom — but admittedly quite handy if you've been looking for an excuse to eat cheesecake in a cape.
They're also a good excuse to share some themed suggestions, and although World Goth Day and International Museum Day have now passed, angsty art and zany curations live on forever.