The lunar calendar has 29 days in a single month and 30 days in a double month. Every 500 years, 97 first months are big months. 19, leap 7 years, fixed leap as big as June. The lunar calendar adopts the method of "fixing the new moon"-taking the new moon as the first day of each month, dividing the tropic year into 24 solar terms, and placing the leap in the month lacking neutral atmosphere, which not only reflects the influence of solar heat on the earth, but also reflects the moon's dominance. In addition, the periodic changes of the tidal resonance of the sun on the earth combine the lunar month with the sunny year, which is a whole for China. From time to time, there will be 2-4 big months and 2-3 small months adjacent. A month with insufficient qi is regarded as a leap month, and a leap month is uncertain. The solar terms of the same name fluctuate for 3-4 days in the Gregorian calendar (referred to as Gregorian calendar for short). Which month is the lunar leap month? It depends on the 24 solar terms in a year.
In the China lunar calendar, the 24 solar terms are divided into 12 solar terms and 12 solar terms. The date of the 24 solar terms of the lunar calendar is postponed month by month, so in some lunar months, the middle term falls at the end of the month, and there will be no middle term next month. Generally, there will be a month without neutral words every two years, which coincides with the year when leap months are needed. Therefore, the lunar calendar stipulates that a month without a neutral term is a leap month. For example, April 29th of 200 1 lunar calendar is a neutral noun.
If we abandon these complicated astronomical calendars, we just want to calculate the simple time of trunks and branches, and only need to know the trunks of ten days and branches of twelve days.
Ten days of work: A, B, C, D, E, Ji, G, Xin, Ren and Gui. Twelve earthly branches: Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai. Branches or yin and yang: a, c, hai. Zi, Yin, Chen, Wu, Shen and Xu are the Yang branches, while Ugliness, Mao, Si, Wei, You and Hai are the Yin branches. The heavenly stems are arranged with the earthly branches, with the heavenly stems in front and the earthly branches behind. The heavenly stems start from A, the earthy branches start from Zi, the sunny stems are arranged with the yang branches, and the shady stems are arranged with the yin branches.
1 .jiazi 2. Ugly B 3 Bing Yin 4. Ding Mao 5. Chen Wu 6. Keith 7. Wu Geng 8. Xin Wei
9. Ren Shen 10. Gui You 1 1. JOE 12. Yihai 13. Bing Zi 14. Ding Chou 15. Wuyin 16. Ji.
17. Chen Geng 18. Xinsi 19. Renwu 20. Guiwei 2 1. Shen Jia 22. Yiyou 23. Xu Bing 24. Ding hai.
25. Wu Zi 26. Ugly 27. Geng Yin 28. Xinmao 29. Yan Chen 30. Your company 3 1. Wu Jia 32. the Kingdom of Wei（220-265 A.D）
33. bing Shen 34. Dingyou 35. The reform movement of 1898. Jihai 37. Gengzi 38. Xin Chou 39. Ren Yin 40. Guimao
4 1 .Chen Jia 42. Yisi 43. Bingwu 44. Ding Wei 45. Wu Shen 46. Ji You 47. Geng Xu 48. Xinhai
49. Renzi. Guichou 5 1. Good news 52. Mao yi 53. Chen Bing 54. Butyl 55. Five, five, six Not yet.
57. Geng Shen 58. Heart has 59. Ren Xu 60. Guihai
Tree trunk and branch chronology
For example, Jia Zi is the first year, Ugly B is the second year, and Bing Yin is the third year ... Sixty years is a week. At the end of the week, it starts from the year of Jiazi, and goes on and on. For example, 1929 is the year of the lunar calendar, 1930 is the year of the lunar calendar ... and then 1989. It is arranged in this way. Divide the Gregorian calendar year by the remainder of 60, and then subtract 3 to get the serial number of the lunar trunk and branch in that year, and then check the age of the trunk and branch. If the serial number is less than or equal to zero, add 60 to the branch serial number. For example, find the trunk and branches of 199 1 year; 1991÷60 = more than 33 1 1, and the annual serial number of the branch = 1 1-3=8. Check the branch table and know that the year is Xin Wei nian. Another example is to find 1983 branches and branches:
Dry-branch moon method
The method of keeping track of the moon is not widely practiced, and it is mainly used by astrologers to calculate the eight characters. The method is as follows: if you meet Jia Zi or your own year, the first month is C Yin; B or Geng Year, the first month is Wuyin; The first month of year C or Xin is Gengyin, the first month of year Ding Nian or Ren is Renyin, and the first month of year E or decyl is Jiayin. The branch of the first month is known, and the rest months can be inferred in the order of 60 jiazi.
Dry branch method
The first day of Jiazi, the second day of Ugly B, the third day of Bingyin ... the 60th day is a week. A week later, starting from Jiazi Day, it started again and again. For example, the first day of the first lunar month (1989) is Ding Youri, and the second day is the Reform Movement of 1898 ... The seventh day of March is exactly 60 days.
Chronology of cadres and branches
The earthly branches at the time of day are also certain, so 24 hours with twelve earthly branches, at night 1 1 point to 1 point, 1 point to 3 o'clock are ugly, and the rest are inferences. The day of the hour is derived from the heavenly stems of that day, and its Song formula is as follows:
A has given birth to a, and B, G and C come first.
Bing Xin started in Wu, and was destined to be a boxer.
You can't do it, but you can't.
That is, if the day is A or his own, the child should be accompanied by A when he was a child; If the day is b or g, it should be accompanied by c as c; On the day of Bingxin, Wu was the son of Wu; Ding Renri is a boxer; When you know the stems and branches of the seeds, you can infer the rest.