愚人节英语是：fools' day
下面是用英文介绍 愚人节：
april fools' day is a day to play jokes on others, no one knows how this holiday began but people think it first started in france.
each country celebrates april fools' day differently. in france, people call the april fools “april fish”. they tape a paper fish to their friends' backs to fool them. when he or 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.
in the america, people play small jokes on their friends and any other people on the first of aprol. they may point down to your shoe and say, “ your shoelace is untied.” if you believe them and look down to see, you are an april fool then.