On April 1, people like to play jokes on one another. This day is called April Fools' Day. No one is sure how this custom to fool people began. Some people think the tradition began in France. Until the mid-1500s there, April 1 had been the first day of the new year. The calendar was changed in 1564. The first day of the new year was moved to January 1. Some people, though, still celebrated New Year's day on April 1. Others made fun of them for celebrating the new year on the wrong day. They called these people "April fools."
When the new year had begun on April 1, people gave gifts to one another. After the new calendar changed New Year's Day to January 1, some people still gave presents on April 1. But they chose joke gifts. As a result, people came to play jokes on one another on April Fools' Day.
How did people come to play jokes on one another on April Fools' Day?