Geng Yin, how do you calculate these?

Simply put, the date is the dating method of Jiazi.

That is, 10 Tiangan (A, Ji, C, D, E, Ji, G, Xin, Ren, Ghost) and 12 Dizhi (Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu. . . . . . Gui You, Jia Xu. . . .

A total of 60 groups are called Jiazi, that is, a cycle lasts for 60 years, and each group refers to one year.

It's hard to say what you want to ask every day ~! You can buy an almanac or ask an expert.