zodiac and earthly cycle dating method

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The chronology of the heavenly stems and earthly branches is a Chinese tradition Through the combination of ten heavenly stems and twelve earthly branches, 60 years are used as a week, and the cycle is repeated and recorded, which is commonly known as the "stem and branch table".The chronology of stems and branches can push down the historical time, push it forward and backward, and form the current historical chronology.

Chen and Earthly Branches The simplest algorithm

1.Calculation method of celestial stems and terrestrial branches

The formula for calculating the years after AD is:"The number of AD years is first subtracted by three, and the remainder after dividing by 10 is the stems of the sky, and the base is used instead.Divide by 12, and the remainder is the Earthly Branch Year." Take 2010 as an example, subtract 3 to get the base 2007, divide it by 10 to get the remainder 7, check the order of the heavenly stems (A, B, C, D, Wu, Ji, Geng, Xin, Ren, Gui).Get "Geng", then divide the base 2007 by 12 to get the remainder as 3, and then recycle to check the order of the Earthly Branches (Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, Hai) to get" Yin ", so 2010 is the year of Geng Yin.(If you get 0, it can be understood as 12 before 1)

2.The terrestrial branch of the month is fixed, such as the beginning of the first month, and only the month is calculated.

Monthly stem = annual stem number multiplied by 2+month Example:2010 (Gengyin) March (Chen month) celestial stem = 7*2+3=17, 10 celestial stems as a cycle, just remove 10 , get 7, the seventh rank of the heavenly stem is Geng, then the stem branch of this month is Gengchen.

3.Eight characters to see the daily stems and branches

Daily stems from 1900 to 1999 = (two digits at the end of the year + 3) * 5+55 + (two digits at the end of the year) Number-1) Divide 42000 - 2099 daily stem and branch base = (two digits at the end of the year + 7) * 5+15 + (two digits at the end of the year + 19) divided by 4 (only the quotient is used, the remainder is not used, counted 60 is removed from 60) Example:Monday, April 12, 2010, the base of daily branches = (10+7)*5+15+(10+19)/4=47 (multiples of 60 have been removed) This is January 1 Daily dry count.From January 1st to April 12th, it is 47+31 (the number of days in January, and so on) +28+31+12=149, remove the multiple of 60 to get 29, remove the multiple of 10 from the heavenly stem and the remaining 9 is Ren, and the earthly branch is removed The multiple of 12 and the remainder 5 are Chen, and today"s stem is Imchen.

4.When looking at the stems and branches of the eight characters

When the stems and branches are equal to the daily stem ordinal number*2+the daily stem ordinal number-2

5, the age method is reversed from This year"s stem branches are introduced for any age.

That is, the age minus 60 is the base number, the multiples of 10 are removed as the number of the heavenly stems, and the multiples of 12 are removed as the number of the earthly branches.If this year is the year of Geng and Yin, the stems and branches of the 56-year-old birth year are deduced like this:56 to 50, 6, Tiangan from Geng to 6, B, terrestrial branch to 56, minus 48, more than 8, 8 from Yin, Wei, birth year is Year B.At the age of 65, if more than 60 5"s are removed from the birth year, 5 C"s are pushed back from this year"s celestial stems, and 5 places are pushed backward from this year"s terrestrial branches.The birth year is the year of Bingxu.

Comparison of the Years of the Heavenly Stems and Earthly Branches

1-10 Jiazi Yi Chou Bing Yin Ding Mao Wu Chen Ji Si Geng Wu Xin Wei Ren Shen Gui You

11-20 Jia Xu Yi Hai Bing Zi Ding Chou Wu Yin Ji Mao Geng Chen Xin Si Ren Wu Gui Wei

21-30 Jia Shen Yi You Bing Xu Ding Hai Wu Zi Ji Chou Geng Yin Xin Mao Ren Chen Gui Si

31-40 Jia Wu Yi Wei Bing Shen Ding You Wu Xu Ji Hai Geng Zi Xin Chou Ren Yin Gui Mao

41-50 Jia Chen Yi Si Bing Wu Ding Wei Wu Shen Ji You Geng Xu Xin Hai Ren Zi Gui Chou

51-60 Jia Yin Yi Mao Bingchen Ding Si Wu Wu Ji Wei Geng Shen Xin You Ren Xu Gui Hai

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