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Unlike most of the other non-foolish holidays, the history of April Fool's Day, sometimes called All Fool's Day, is not totally clear. There really wasn't a "First April Fool's Day" that can be pinpointed on the calendar. Some believe it sort of evolved simultaneously in several cultures at the same time, from celebrations （51） the first day of spring.
The closest point in time that can be （52） as the beginning of this tradition was in 1582, in France. （53） to that year, the new year was celebrated for eight days, beginning on March 25. The celebration culminated on April 1. （54） the reform of the calendar under Charles IX, the Gregorian calendar was introduced, and New Year's Day was moved to January 1.
However, communications being what they were in the days when news traveled by foot, many people did not receive the news for several years. Others, the more obstinate crowd, refused to accept the new calendar and （55） to celebrate the new year on April 1. These backward folk were labeled as "fools" by the general populace. They were （56） to some ridicule, and were often sent on "fools errands" or were made the butt （笑柄）of other practical jokes.
This harassment （骚扰）evolved, over time, into a tradition of prank-playing （开玩笑）on the first day of April. The tradition （57） spread to England and Scotland in the eighteenth century. It was later introduced to the American （58） of both the English and French. April Fool's Day thus developed into an international fun fest, so to speak, with different nationalities （59） in their own brand of humor at the （60） of their friends and families.