Every prankster’s favorite day is approaching, a day when the rest of us keep our guard up and greet announcements or surprises with a healthy dose of skepticism. April 1 has long been associated with harmless tricks and playful deception, but the origins of April Fools’ Day remain something of a mystery - part history, part folklore, and entirely entertaining.
Historians generally trace one popular theory to the adoption of the Gregorian calendar in 1582. When Pope Gregory XIII introduced the new calendar, New Year’s Day shifted from late March to January 1. In places like France, some people either didn’t hear about the change or simply refused to accept it. Those who continued celebrating the new year around April 1 became targets of jokes and were dubbed “April fools.”
The origins of April Fools’ Day may also trace back to ancient spring festivals. The Roman celebration of Hilaria featured disguises, games, and general merriment - traditions that still resonate in today’s pranks. In France, the holiday became known as Poisson d’Avril, or “April Fish,” where people would secretly pin paper fish to each other’s backs. In Scotland, Gowkie Day (from “gowk,” meaning fool) was celebrated with tricks on the unsuspecting. The first documented mention of April Fools’ Day comes from a 1561 poem by Flemish writer Eduard de Dene, which describes a nobleman sending his servant on pointless errands, highlighting the idea of “fool’s errands.” By 1686 in Britain, the day was called “Fooles holy day,” with recorded pranks including tricking people into attending fictitious events, such as “washing the lions” at the Tower of London.

