Things You Didn't Know About April Fools Day

How It All Began 1 of 11

Fittingly, no one really knows how the shenanigans on April Fool's Day started. Even historians haven't been able to pin it down. The only possible theory is that the first April Fool's Day happened in the 1580 when the Western Hemisphere switched from the Julian calendar to the Gregorian calendar, particularly in France under Charles IX.

The switch moved the start of the year from March 25th to January 1st, but since word traveled slowly in the 14th century, a lot of folks weren't aware things had changed (or were too stubborn to accept it) and they continued to party for the new year on April 1st.