What festivals were there in the Qin Dynasty?

The word "Mid-Autumn Festival" first appeared in Zhou Li. According to the ancient calendar of China, the 15th day of the eighth lunar month is the middle of August in autumn, so it is called "Mid-Autumn Festival". There are four seasons in a year, and each season is divided into three parts: Meng, Zhong and Ji. Therefore, the second month of the Mid-Autumn Festival is called the Mid-Autumn Festival, and it was not until the early years of the Tang Dynasty that the Mid-Autumn Festival became a fixed festival. The fifteenth volume of the Book of the New Tang Dynasty contains "Wang Wenxuan and Wang Wucheng released the Spring Festival and Mid-Autumn Festival" and "In the 19th year of Kaiyuan, the Taigong Fu Shang Temple was established, and its partner was Liu Hou Sean." There are sacrifices in mid-spring and mid-autumn festival, and the system of sacrificial music is like a text. According to historical records, the ancient emperor's Moon Festival was on the 15th day of the eighth lunar month, which happened to be half that of Sanqiu, hence the name "Mid-Autumn Festival".