Why is Bingzi Day special?

The Bingzi Festival is the thirteenth day of the China calendar. This should be Wu Bingri or Renqi Day.

The first 13 year of the China lunar calendar is called the "Year of the Bingzi". In the following lunar year, the number of years is divided by more than 60 16, or the number of years is subtracted by 3, and the remainder is divided by 10 to be 3, and the remainder is divided by 12 to be 1. The year from the first day of the first month of that year to New Year's Eve of the following year is the "third year".

Cadre and branch calendar method:

This is the longest used calendar in the world, and people already know this for sure. There are documents to check. It began in February of the third year of Lu Yingong in the Spring and Autumn Period and ended in Xuantong in the Qing Dynasty (A.D.191) (after the adoption of the A.D. calendar in the first year of the Republic of China (A.D. 19 12), it was still used by the people).

The day before Bingzi's birthday is Yihai Day, and the day after that is Ding Chou Day. On the theory of yin and yang and five elements, the three points of heavenly stem belong to the fire of yang, and the son of earthly branch belongs to the water of yang and belongs to fire and water. Wu performed in the stream on Bingzi Day. Calendar year, calendar month, calendar day and calendar hour are also the basis of China's ancient skills, such as Yuan Hai Zi Ping and San Tong Ming Hui.

Refer to the above? Baidu Encyclopedia-Bingziri