April Fools’ Day, also called All Fools’ Day, has been celebrated for several centuries by different cultures, its exact origins remain a mystery. Some historians speculate that April Fools’ Day dates back to 1582, when France switched from the Julian calendar to the Gregorian calendar, as called for by the Council of Trent in 1563.

At the time, jesters were considered wise men for their ability to put things in perspective with humor.  Apparently, the day was so well-received that Constantine made it an annual holiday, a day that has appropriately become known as April Fools’ Day.