In 2023, the twentieth day of the first lunar month should be avoided.

Sacrifice is a part of China's ethical code and the main part of Confucian etiquette. Five rites, sacrifice is not more important than sacrifice, sacrifice is to serve the gods for happiness. The objects of sacrifice are divided into three categories: God, Earth and God. God is called sacrifice, the earth is called sacrifice, and the ancestral temple is called enjoyment. The concept of sacrifice records the explanations of Confucian classics such as Zhou Li, The Book of Rites, Justice in the Book of Rites and Da Xue Yan.

In ancient China, there was a strict level of sacrifice, because "God did not admire the nonhuman, and the people did not worship the nonhuman". Heaven and earth _ Tianzi Festival. Kings and doctors sacrifice mountains and rivers. Literati can only worship ancestors and kitchen gods. Tomb-Sweeping Day, Dragon Boat Festival and Double Ninth Festival are the days for ancestor worship.