It is the best season to play the moon.  People love to play the moon at this time. It is the season from the Tang Dynasty. This is the origin of the Mid-Autumn Festival.

　　The joyous Mid-Autumn Festival, the third and last festival for the living, was celebrated on the fifteenth day of the eighth moon, around the time of the autumn equinox. Many referred to it simply as the "Fifteenth of the Eighth Moon". In the Western calendar, the day of the festival usually occurred sometime between the second week of September and the second week of October.