April Fool’s Day began in the late 16th century when the Gregorian calendar moved New Year’s Day from April 1 to January 1. Those who kept the old tradition were called fools, which began a new tradition of pulling pranks.A recent prank I’m aware of was the releasing of three pigs into a school building (but not before numbering them 1, 2, and 4). What a surprise for those looking for pig number 3!