March 3 is a traditional festival for the Han nationality and many ethnic minorities, and it is the third day of the third month of the lunar calendar. It was called Shangsi Festival in ancient times. According to legend, March 3rd is the birthday of the Yellow Emperor. China has had "On February 2nd, the dragon looked up; I was born in Xuanyuan on March 3rd. After Wei and Jin Dynasties, Shangsi Festival was changed to March 3, which was followed by later generations, thus becoming a festival for Han people to drink by the water and have a spring outing in the suburbs. Different places have different customs.
The third day of March here refers to the lunar calendar. Generally speaking, this time is the season when everything recovers. That is to say, many hibernating animals and so on have already started to move. Ghost should be an "agent", which should be the previous statement.
What's said here is "On March 3rd, the snake came out of the mountain, and on September 9th, the snake went into the ground" (the pronunciation of Changsha dialect is homophonic). There is a custom of eating local dishes and boiling eggs.