Happy New Year! (April Fool's Day)

I was reading the Colorado Daily today at lunch and the claimed this as the origination of April Fool's Day:

"The beginning of the tradition was 1582 in France. Prior to that year, the new year was celebrated for eight days, beginning on March 25 and culminating on April 1st. With the reform of the calendar under Charles IX New Year’s Day was moved to January 1st. Some people had not heard about or didn’t believe the change in date, and were labeled as ‘fools’."

Who knew? I didn't.