When does Gengri mean?

When the date is marked with dry branches, there will be a seventh word "Geng" for a dry day. The summer solstice is three Geng volts, which means that the third Geng solstice after summer begins to decline.

In ancient China, time was recorded through the combination of heavenly stems and earthly branches. The number of heavenly stems is 10, which is A, B, C, D, E, G, Xin, Ren and Gui (guǐ), and the number of earthly branches is 12, which is Zi, Ugly, Yin, Mao, Chen, Si, Noon, Wei and Shen. Heavenly stems and earthly branches, you will get Jia Zi, Yi Chou, Bing Yin, Ding Mao and so on. And cross-matched 60 times, so it is called sixty flowers.

Extended data:

midnight

"Three Geng" is the encounter with three "Geng" characters, and the fourth Geng Day will be the first time. Because the number of heavenly stems is 10, there is a Geng Day every 10 day, such as Geng Zi Day, Geng Yin Day and Chen Geng Day. 365 days a year (366 days in leap year) is not an integer multiple of 10. One day this year is Geng Day, and next year is not necessarily Geng Day. Due to the uncertainty of Geng day, the date of entering the cave is different every year.

Sanford

Three volts are divided into initial voltage, intermediate voltage and final voltage. The third Geng day from summer to the future is the first day of first lodging, the fourth Geng day is the first day of intermediate lodging, and the first Geng day after beginning of autumn is the first day of last lodging. The first day and the last day are 10, and the days in between are not fixed. There are four Geng days between the summer solstice and beginning of autumn, with an average of 10 days; There are five Geng days with an average of 20 days.

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