What is breaking the moon? We usually see the word Jiazi in the prediction of Zhouyi Bagua.

Because the dry day is ten days (ten days), the earthly branch day is twelve days, and the extra two days in every ten days are sky surveys. The earth branch received in the eight diagrams and six hexagrams collided with the moon, which is called the broken moon Jiazi. It is the first day of the 60-day cycle after heavenly stems and earthly branches's conjunction, and it is also called the 60-year sub-table.