Day of the Holy Innocent
Today Colombia celebrates April Fools, but it is called “Dia de los Santos Inocentes.” It is similar to April fools because of the pranks that people play on each other today. The roots of celebrating the days actually have to do with the bible and King Herod and the massacre of the innocents. Basically the magi coming to visit Jesus are alerted by an angel and return home via a different route hoodwinking Herod. I already find the magi amusing because who does not love pronouncing Balthazar.
Another amusing fact is that one of the precursor of April Fools day is the Feast of Fools a medieval tradition that was held, you guessed it, on December 28.