When did sixty flowers start?
Month: the first month begins in the shade, and the branches of the earth are fixed in each month, and then they are combined with the heavenly stems in turn; From the first month to the third month of the first year, February is Ding Maoyue and March is Chen Wu. From Jiazi month to Guihai month, there are sixty Jiazi, which is exactly five years.
Day: From the day of Jiazi, in order, the 60th day happens to be the cycle of trunk and branch.
As early as 2697 BC, when China's ancestor Huangdi established the country, heavenly stems and earthly branches ordered the brain to explore the qi of heaven and earth and the five elements (water, fire and earth in Jin Mu), which began ten days of work, including A, B, C, D, E, Ji, G, Xin, Man and Gui, as well as Zi, Ugly, Yin, Mao, Chen, Si, Zi.
Extended data:
You can calculate the monthly expenditure according to the annual expenditure, but you can't calculate the date, which requires consulting the relevant perpetual calendar. According to the year, there is a formula: C is the first in Jiawu year, and E is the first in B-Geng year. Bing Xin must find Geng, and Ding Ren's position is popular, even more. Jia Yin is the real way to find it.
Heavenly stems and earthly branches Chronology is the concentrated expression of China culture and the crystallization of sages' wisdom. It is not out of date and still exists in the hearts of every Chinese son and daughter.
Baidu Encyclopedia-heavenly stems and earthly branches