e knows how this holiday began but people think it first started in France . ? In the 16th century, people celebrated New Year's Day from March 25 to April 1. ? In the mid — 1560s King Charles IX changed it from March 25 to January 1. But some people still celebrated in on April 1, so others called them April Fools. April Fools' Day ? Each country celebrates A.F.D. differently. ? In France, people call the April Fools “ April Fish ”. They tape a paper fish to their friends' backs to fool them. When he/she finds this, they shout “ April Fish !”? In England , people play jokes only in the morning. You are a “ noodle ” if someone fools you. In Scotland , April Fools' Day is 48 hours long. They call an April Fool “ April Gowk ”. Gowk is another name for a cuckoo bird.