Heavenly stems and earthly branches's permutation and combination?

Heavenly stems and earthly branches: Also known as "dry branch", it is a combination of the 10-day dry branch of "A, B, D, E, G, E, E" and the 12-day dry branch of "Zi Chou Mao Yinchen didn't apply for you at noon".

Sixty Jiazi: Match ten "A, C, E, G and Ren" with twelve "Zi, Yin, Chen, Wu, Shen and Xu", ten "B, D, Zi, Xin and Gui" and twelve "Ugly, Mao, Si, Wei and Gui".

The ancients used heavenly stems and earthly branches to indicate the order of year, month, day and time, and used it repeatedly. Trunks and branches were originally used to record days, and later they were mostly used to record years. Trunks and branches are still used in the Lunar New Year.

How to use:

Quarter year

Each branch lasts for one year, and after sixty branches (commonly known as "sixty jiazi"), it starts from the beginning and repeats itself.

Second, remember the moon.

Every month, the earthly branches are fixed (the first day of the first month is cloudy, the second month is Mao, the third month is Chen ... until December is ugly) and then they are combined with the heavenly stems in turn. The first month of the first year is Bing Yin, February is Ding Mao, March is Chen Wu, and so on. Just like the above table, from Jiazi to Guihai, there are 60 Jiazi, just five years.

San Ji Li

In order, two months and 60 days is just a cycle of dead branches.

Fourth, grasp the time

The punctuality branch is fixed, twelve hours a day, and the time is from 23: 00 to1:00; 1: 00 ~ 3: 00 is the ugly time ... 2 1: 00 ~ 23: 00 is the stone sea time.