In which dynasty were the main traditional festivals in China formed?

The main traditional festivals in China were formed in the Han Dynasty. According to historical records, the Spring Festival, Dragon Boat Festival, Mid-Autumn Festival and other festivals were all formed in the Han Dynasty. Most of the traditional festivals in China were formed in ancient times. Different festivals have different origins and histories, and their formation and development need long historical accumulation and cultural inheritance. However, the stereotypes and formation of some important festivals and traditional cultural customs can be traced back to the Han Dynasty, Tang Dynasty, Song Dynasty and other historical periods. For example, the Spring Festival, Dragon Boat Festival and Mid-Autumn Festival in Han Dynasty, Tomb-Sweeping Day, Double Ninth Festival and Laba Festival in Tang Dynasty, Lantern Festival, Qixi Festival and Winter Festival in Song Dynasty all have profound historical background and cultural connotation in China culture.