A Brief History of April Fool's Day
The "Brief History" itself is here.
You probably know a good deal of it already. But I did want to post something about the day in order to segue into a warning about Damian Thompson's blogpost on the day. Really. Don't go there. It could cause a seizure. Particularly if you don't know the meaning of Aprilis Stulte Dies. Or if, like I did, you sort of breeze by it without paying any attention to the meaning but just sort of getting distracted by the odd grammar.
I'm only calming down now.