Four days after is Chinese Mid Autumn Festival. It is August 15th in Chinese lunar calendar.
it is said that in that day ,the moon in the sky is the most big and round and is nearest to the earth in the whole year.
In Chinese "round" means "圆"( yuan) which has another neaning "团圆"(tuan yuan) ,it is means "reunion" in english, so chinese people will has a family reunion in that day, and will eat moomcake at that time, because the mooncake is round too, like the round noon.
About the festival ,there is a beautiful fable about it . It is too long , i should take a long time to say.
maybe next time to tell you .