China Traditional Ganzhi Calendar

Refers to 1 day and 2nd day of every ten days of the lunar calendar, namely 1 day and 2nd day, 1 1 day,12nd day and 2nd day of the lunar calendar.

According to heavenly stems and earthly branches, "A, B, C, D, E, Ji, G, Xin, Man and Ghost" is called ten days' work.

Every month is divided into three parts, 1- 10, 1 1-20, 2 1-30, with a period of ten days, and the tenth day is ten days.

The days of 1- 10,1-20, and 2 1-30 are respectively: A day, B day, C day, D day, E day, Ji day, Geng day, Xin day, Ren day, and Geng day.

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, which is used in calendar, art, calculation, naming and so on.

Extended data

The trunk calendar is different from the usual solar calendar (such as the Gregorian calendar), and the length of a month in the Gregorian calendar is artificially specified, which has nothing to do with the astronomical phenomena. Therefore, the trunk calendar is a solar calendar with China characteristics, which can reflect the changes of seasonal climate.

Every year's dry calendar can basically correspond to the date of the solar calendar-because both belong to the solar calendar, the lunar calendar can't. For example, every year on February 4th or 5th of Gregorian calendar is beginning of spring, which is the beginning of silver moon; April 4th or 5th every year is Tomb-Sweeping Day, which is the beginning of Chen Yue.

Baidu Encyclopedia-heavenly stems and earthly branches