Once upon a time, holidays were made from creation myths. They explained seasonal cycles and celebrated the good and the mysterious in the world.
We still have those and then all the phony commercial ones, like international pizza day.
Here’s a made-up “world day” I find useful and amusing: Back-up Day. Buy a device to store photos and data. Free up space. YAY.
Enjoy whatever you are celebrating. Today and everyday.
All The Best 