Every August 16th, Americans across the land of funnel cakes and poor judgment unite to celebrate National Roller Coaster Day—a holiday dedicated to voluntarily defying physics, common sense, and whatever you ate for lunch.

(NEXSTAR) — For one day only in August, you can get into any of our national parks for free.

Here’s everything you need to know about why August 8 is celebrated as National Pickleball Day and its significance in today’s world.