The most (popular) theory about the origin of April Fool's Day involves the French calendar reform of the sixteenth century.

The theory goes like this: In 1564 (France) reformed its calendar, moving the start of the year from the end of March to January 1. Those who failed to keep up with the change, who stubbornly clung to the old (calendar)

system and continued (to) celebrate the New Year during the week that fell between March 25th and April 1st, had jokes played on them. Pranksters would surreptitiously (stick) paper fish to their backs. The victims of this prank were thus called Poisson d'Avril, or April Fish—which, to this day, remains the French term for April Fools—and so the (tradition) was born.

The calendar-change hypothesis (seems), on the surface, like a logical explanation for the origin of April Fools. However, the hypothesis becomes less plausible if we examine the history of calendar (reform) in more detail.

Question)
1. How much do you know about April Fools Day ?
2. Do you have any funny stories on this day ?