Mid Autumn Festival is a traditional festival of China. It used to be as important as Spring Festival .It is usually celebrated in September or October. This festival is to celebrate the harvest and to enjoy the beautiful moon light. To some extent, it is like Thanks Giving day in western countries. On this day, people usually get together with their families and have a nice meal. After that, people always eat delicious moon cakes, and watch the moon. The moon is always very round on that day, and makes people think of their relatives and friends. It is a day of pleasure and happiness. Hope you have a wonderful Mid Autumn festival!

参考翻译：

中秋节是中国的传统节日。它曾经是和春节一样重要，它通常在九月或十月庆祝。这个节日是为了庆祝丰收而去欣赏美丽的月光。在某种程度上，这就像在西方国家的感恩节一样。在这一天，人们通常和家人聚在一起吃一顿丰盛的饭菜。在那之后，人们总是吃美味的月饼，看月亮。那天月亮总是很圆，让人想起他们的亲戚和朋友。它是快乐和幸福的一天。希望你有一个美好的中秋节!