When did the folk festivals in China begin?

China folk festivals began on February 22nd of Gregorian calendar 12. "Winter 99" is relative to "Summer 99", which means that people are 998 1 day from the winter solstice. There are many customs of "counting nine", among which "Jiujiu Song" is the most extensive and has a long history.

"beginning of winter 99", also known as "99", is a folk solar term in winter in China, which reflects the general situation of temperature changes in winter in China. "Winter September 9" generally starts from the day of winter solstice and ends with a fright, that is, from February 22nd to March 2nd of the following year in Gregorian calendar 12. Every nine days, until the end of 998 1, the weather gradually gets warmer.