https://www.npr.org/2022/04/01/ [login to see] /april-fools-day-history
Ever wonder where April Fools' Day came from? Well, surprise! The joke's on you. Nobody seems to know its true origins.
Historians do have some clues, though.
For one thing, we do know that April Fools' Day customs date back to at least Renaissance Europe, but it's likely the tradition originated long before then.