What does ugly day mean?

Sub-day is a day in the calendar of heavenly stems and earthly branches, China. Sub-day is not a specific day, it will appear every 12 days.

Heavenly stems and earthly branches, referred to as "dry branch". In the ancient calendar of China, A, B, C, D, E, Ji, G, Xin, Man and Ghost were called "Ten Heavenly Stems", while Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai were called "Twelve Earthly Branches".

Ten subjects and twelve subjects are collocated in turn to form sixty basic units, and they cooperate with each other in a fixed order to form subjects of families and families. Judging from the Oracle Bone Inscriptions unearthed in Yin Ruins, heavenly stems and earthly branches was mainly used to record the date, month, year and time in ancient China.

Judgment period:

To judge the quality of a day, we need to know many aspects of it. First, we must know its cycle. The sub-day is not a specific day, and there is a sub-day every 12 days. Of course, the meaning of sound varies with the weather. And every 60 days, there will be the same day in heavenly stems and earthly branches.

Heavenly stems and earthly branches collocation arrangement, heavenly stems in front of the soil branch behind, heavenly stems from a, soil branch from the child, Yang stem with Yang branch, Yin stem with Yin branch (Yang stem without Yin branch, Yin stem without Yang branch). There are sixty combinations called "Sixty Jiazi".