Why is sixty called "flower armor"

The word "Huajia" comes from the ancient calendar of China, with 60 years as a cycle, and each cycle is called "Jiazi", so it is also called "Huajia" because of the various names of branches and branches. A flower is a nail. Through the combination of heavenly stems and earthly branches, each branch represents one year.

Another way of saying it is that there is a white mark at the root of a person's nail. At the age of 60, with the aging of the body, this white mark will disappear, so it is called "flower nail".

Extended data heavenly stems and earthly branches

Originated from the observation of astronomical phenomena in ancient China. Ten dry words: encounter, enlightenment, gentleness, firmness, harmony, Tu Wei, Shang Zhang, heavy light, mystery, sunshine. The twelve earthly branches say: sleepy head, red heart, taking photos, one hand, holding beard, falling flower, Dunyi, Qi Xie, Qitan, and Dayuanxian. ?

The simplified heavenly stems and earthly branches: "A, B, C, D, E, Ji, G, Xin, Man and Ghost" is called the ten heavenly stems, and "Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai" are called the twelve earthly branches.

Ten heavenly stems and twelve earthly branches are matched in turn to form sixty basic units, and they cooperate with each other in a fixed order to form the chronology of the stems and branches. Heavenly stems and earthly branches's invention had a far-reaching impact, and heavenly stems and earthly branches still uses it today, for calendar, technology, calculation, naming and so on.

Baidu encyclopedia-huajia

Baidu Encyclopedia-heavenly stems and earthly branches