What time does the ancient "Jiazi Festival" in China mean?

Jiazi Festival is the first day of the China calendar. In the ancient calendar of China, A, B, C, D, E, Ji, G, Xin, Ren and Gui were called "ten heavenly stems", while Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai were called "twelve earthly branches". The two cooperate with each other in a fixed order, forming the method of calendar, calendar and calendar. Ancient sages believed that Jiazi was the beginning of the main branch and the first combination of the main branches. From the beginning of the same thing, things are established. After Jiazi, there are combinations of Ugly B and Yin C, that is to say, after Jiazi appeared, others appeared one after another. Because "Jiazi" has such a special meaning, this idea has also been applied to the study of choosing a date. Everything is difficult at the beginning, and it is best to use Jiazi every day. What started: going public to do business, building a house, and so on.

People's Republic of China (PRC)'s founding date 1 949101October1is also "Jiazi Day".