The origin of Yang Gong's sacrifice on the thirteenth day of the first month

This is a legend. A long time ago, there was an old man named Yang. People call him Yang Gong. This father-in-law Yang has thirteen sons, all of whom are like wolves and tigers. With money, we can say that we need money and people. Yang Gong is a little tall. One day, when I was happy, I bragged about Daniel and said, "My son just didn't give birth for a month, and there is one left to accompany me for the New Year."

The speaker has no intention, but the listener has a heart. Unexpectedly, this sentence was heard by a fairy who happened to pass by. The curse was born.

Don't be too crazy. The fairy told the Jade Emperor what Yang Gong said. The jade emperor was furious and ordered him to accept a son every month. This day happens to be the thirteenth day of the first month, and then every month will be two days earlier, that is = the eleventh day of the first month, the ninth day of March, and so on. It is said that there was a leap in July this year, so two were harvested in July, so this year is thirteen months, which is also the end of Yang Gong's Thirteen Sons. So I don't have a son to spend the New Year with Yang Gong. Later, people designated this day as the anniversary of death. These days are very poisonous, and it is not appropriate to do things.