Why is the Mid-Autumn Festival called eight festivals?

Mid-Autumn Festival, also known as Moon Festival, Autumn Festival, Mid-Autumn Festival, August Festival, Moon Chasing Festival, Mid-Autumn Festival, Daughter's Day or Reunion Festival, is a traditional cultural festival popular among many ethnic groups in China. It falls on the 15th day of the eighth lunar month. It is named because its value is only half that of Sanqiu. It is said that the moon is closest to the earth this night, and the moon is the biggest and brightest, so there has been a custom of drinking and enjoying the moon since ancient times; The daughter-in-law who goes back to her parents' house will go back and forth to express her happiness and good luck. In some places, such as Ningbo, Taizhou and Zhoushan, the Mid-Autumn Festival is scheduled for August 16, which is related to changing it to "Lantern Festival on the 14th day of the first month and Mid-Autumn Festival on the 16th of August" in order to prevent attacks by officers and men of the Yuan Dynasty and Zhu. Besides, in Hongkong, after the Mid-Autumn Festival, we will hold another carnival in Izayoi, called "Chasing the Moon".

At noon, the shortest day of the polar shadow is the summer solstice, also known as the north solstice or the long solstice, and the longest day of the polar shadow is the winter solstice, also known as the south solstice or the short solstice. About the Yin and Shang Dynasties, people already knew how to set the season by measuring the shadow of the pole. In addition, in the spring and autumn, it is found that one day is equal to day and night, so these two days are designated as vernal equinox and autumn equinox. According to Zuo Zhuan, it was mentioned in the Spring and Autumn Period that it was done in two halves. Although it is beneficial to the arrangement of agricultural production, the climate changes greatly in a year, and the interval between two and a half years is very long, which inevitably cannot meet the actual needs of farmers' production. Therefore, some solar terms have been formulated one after another, and it is speculated that the beginning of four seasons must be added first, that is, beginning of spring, Changxia, beginning of autumn, beginning of winter, Sili and Erban are called "separation and combination", also known as eight festivals.

Landlord, you are wrong! Ha ha!