What do you mean five days?

Wue is a Chinese word pronounced W ǔ W ǔ, which means the fifth Wue day after beginning of spring and beginning of autumn. In ancient times, it was regarded as the day of Spring Club and Autumn Club.

Yu's "Social Day" poem: "Jia Zi writes short stories diligently, and pushes five five times without spring." The fifth "E-Day" after beginning of spring begins on the same day in beginning of spring, and the fifth day is the day when the heavenly stem "E" matches a certain geographical branch day.

The social time of the Spring Festival is generally the fifth May Day after beginning of spring, which is introduced from the old yellow calendar in the order of 60 Jia Zi, and every 60 days is a round. Among them, the six days of Wuzi, Wuyin, Chen Wu, Wuwu, Wushen and Wuxu are called Wuri, also known as "Liu Wu". The Spring Festival is a time to worship the land gods in spring. There was no fixed date in ancient times, and the dates chosen in the pre-Qin, Han, Wei and Jin Dynasties were different. Since the Song Dynasty, the fifth day after beginning of spring has been regarded as a social day. In ancient China, the Social Day Festival was held twice a year, divided into "Spring Society Day" and "Autumn Society Day". The spring association prayed for the blessing of God and the harvest of grain. After the harvest, Qiushe reported the good news of the harvest and thanked the social gods.

There is a five-day holiday every ten days, which is almost 40 days.