April Fools' Day or sometimes called All Fools' Day, has been around since the 19th century. It is an annual custom on April 1, consisting of harmless pranks. Here is a short video of last year's prank people did to one another:
I appreciate organization, semantics, cleanliness, proper etiquette, and enjoy the smell of freshly ground peppercorns. I am driven by an unwanted urge to try and improve things. It is very annoying, especially since I am not the expert, but I cannot find sleep or joy unless I try.