There is a anniversary of Yang Gong's death in the old yellow calendar.

You mean the anniversary of Yang Gong's death. "Yang Gong banned Japan", also known as "Thirteen Bannings in Yang Gong", was handed down by Yang Junsong, a geomantic master in the Tang Dynasty. These thirteen "taboo days" are 1 month 13, February 1 day, March 9, April 7, May 5, June 3, July1day, July 29, and July 29.

According to legend, Yang Junsong, a geomantic master in the Tang Dynasty, formulated the "Thirteen Taboos for Yang Gong" according to the order of "Twenty-eight Stars". These thirteen "taboo days" are 1 month 13, February 1 day, March 9, April 7, May 5, June 3, July1day, July 29, and July 29.

"Thirteen Taboos of Yang Gong" has been valued by Xuankong since ancient times. In Xuankong's eyes, these thirteen days can never be chosen as opening, construction, marriage, signing contracts and so on.

"The death of Yang Gong" is to commemorate the Yang Jiajiang family, a famous anti-Liao scholar in Song Dynasty. Yang Jiajiang Lao Yang always wins battles, but he always loses for a few days. Later, he came to the conclusion that Yang Gong could not fight when he died. Spread to the people, this year can't do great things, can't visit relatives. ....