愚人节快乐的英语读法——英 [ˈhæpi ˈeɪprəl fuːlz deɪ] 美 [ˈhæpi ˈeɪprəl fuːlz deɪ]
1582年，法国国王查理九世决定采用新改革的纪年法——格里高利历（即通用的阳历），以元旦为一年的开始，改变了过去以四月一日为新年的开端。
In 1582, Charles IX, the king of France, decided to adopt the Gregorian calendar (the general solar calendar), a new year's day as the beginning of the year, which changed the past from April 1 as the beginning of the new year.
但一些守旧派反对这种改革，依然按照旧的历法在这天送新年礼，庆祝新年。
But some conservatives opposed the reform, still according to the old calendar in this day to send a new year gift, celebrate the new year.
从此人们在4月1日便互相愚弄，成为法国流行的风俗。18世纪初，愚人节习俗传到英国，接着又被英国的早期移民带到了美国。
Since then, people have fooled each other on April 1, which has become a popular custom in France. At the beginning of the 18th century, the custom of April Fool's day spread to England, and then it was brought to America by early British immigrants.
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