Ancient origins of April fools day: Hilaria festivals of ancient Rome (yes,hilarious) - a form of ancient brainwashing

Ancient origins of April Fools day:

A tradition taken from ancient Greece, as celebration of the March equinox (day and night are equal length) the ancient Romans had celebrations in honor of the "Mother Goddess" or "mother of the gods".

"the eve of that day they spent in tears and lamentation"

The day after, the winter with its gloom had died, and the first day of a better season was spent in rejoicings. Such days were devoted to general rejoicings and public sacrifices, and no one was allowed to show any symptoms of grief or sorrow.

All kinds of games and amusements were allowed on this day; masquerades were the most prominent among them, and everyone might, in his disguise, imitate whomsoever he liked, and even magistrates.

[link to en.wikipedia.org (secure)]