What does the lamb festival mean on the thirteenth day of the first month?

On the 13th day of the first month, the calendar stated that it was the anniversary of Yang Gong's death, and everything was inappropriate. It is said that Yang Jiajiang went to war on the 13th of the first month and lost seven generals. He thinks this day is unlucky, and then it will be passed down from generation to generation as a memorial.

The algorithm of Yang Gong's one-day death is based on the 13th day of the first month, and then two days are retired every month, such as February 1 1 day, March 9 ... and an exception suddenly appears in August. From the 27th, two days are retired every month, such as September 25th and1October 23rd ... in the first month, suddenly,

The 13th day of the first lunar month is one of the "Thirteen Taboos in Yang Gong", and the taboos on this day are as follows:

In the traditional custom of "the 13th day of the first month", it is forbidden to visit relatives, go out, get married or move.

These taboos were particularly emphasized in the 1960s and 1970s. On this day, even on the "national legal rest day" in the southern mountainous areas, few people go to work in the mountains and fields, and few people go out to do things for fear of accidents.