What does the moon in the calendar mean?

The monthly disaster in the calendar means that this day is not suitable for siege, grazing livestock, getting married, seeing relatives and seeing a doctor. In a word, this is unlucky for many owners.

Hee Sa flat Fang Shu:

"The Tree of God": The cloud says, "Yang Jian is also the victim of the moon." On the day of duty, don't attack the city, don't raise livestock, don't get married, don't seek medical treatment, and don't accept handmaiden. "

Textual research: The six victims are not harmonious. Everything likes to be combined, avoiding rushing things. In the first month, the yin and the hai merged, so the yin and the hai have already harmed each other. In February, the combination of Mao and Xu was destroyed by Chen Chong, so Mao Chen was harmful. The man who built the moon, the head of the gods, rushed to his liking, which was harmful.