What is the ancient chronology of the sexagenary branches

Only when we know the approximate historical time can we deduce the accurate time and date time according to the time of the composition of the heavenly and terrestrial branches

The algorithm of the sexagenary chronology is as follows:

The mantra of the year of the heavenly stem and the earthly branch is: the number of the AD years is reduced by three, the remainder of the division of 10 is the heavenly stem, the base number is changed to 12 division, and the remainder is the year of the earthly branch. Taking 2021 as an example, the year is subtracted by 3 to get the base 2018, divided by 10 to get the remainder 8, and the order of the heavenly stems is "Xin", and then the base 2018 is divided by 12 to get the remainder of 2, and then the cycle is "ugly" to the order of the branches of the Chadi, so 2021 is the year of Xin Chou.

In ancient China, the Ganzhi year was used, and the terms mentioned in modern history, such as the First Sino-Japanese War, the Wuxu Reform, and the Xinhai Revolution, were the Ganzhi years. The so-called stem branch is the abbreviation of the ten heavenly stems and the twelve earthly branches. The heavenly stem and the earthly branch are in accordance with certain rules (the yang stem is matched with the yang branch, and the yin stem is matched with the yin branch.

Or single with single, double with double) can be matched into 60 pairs, that is, a jiazi (60 years), and the time is recorded over and over again.

Heavenly stems: The ten heavenly stems include A, B, C, D, E, G, G, XIN, NON, and DE, of which A, C, E, G, and non are yang stems, and B, D, G, XIN, and DE are yin.

Earthly branches: The twelve earthly branches include Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, and Hai, of which Zi, Yin, Chen, Wu, Shen, and Xu are the yang branches, and Chou, Mao, Si, Wei, You, and Hai are the yin branches. The mantra for the year of the sexagenary cycle is:

The number of years in the Common Era is reduced by three, divided by 10 and the remainder is the heavenly stem, and the base number is changed to 12 divisions, and the remainder is the earthly branch year. ”

Taking 2021 as an example, the year is subtracted from 3 to get the base number 2018, divided by 10 to get the remainder of 8, and the order of the heavenly stems (A, B, C, D, E, AL, G, XIN, NON, and Dec). Get "Xin", and then divide the base 2018 by 12 to get the remainder of 2, and then cycle the order of the Chadi branch (Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, Hai) to get "Chou". Therefore, 2021 is the year of Xin Chou (if 0 can be understood as 1, that is, 12).

The ten stems and the twelve branches are matched in turn to form sixty basic units, so how to calculate the chronology of the sexagenary branches? The sexagenary branch produced the Yanhuang period, and the sexagenary branch chronology takes the beginning of spring as the beginning of the year instead of the first day of the first month of the lunar calendar. With the simple algorithm of the stem branch chronology, it is convenient to calculate the year, so what is the algorithm of the sexagenary branch chronology?

Let's take a look.

1. How to calculate the chronology of the sexagenary branch?

In ancient history, the sexagenary branch was mainly used to record events such as dates.

1. What are the heavenly stems?

The heavenly stems are: A, B, C, D, E, G, G, XIN, NON, and DE.

The earthly branches are: Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, Hai.

2. The situation of the reincarnation of the sexagenary branches

The heavenly stem is reincarnated every 10 from jia to decay.

The earthly branch is reincarnated from the son to the sea every 12.

Ancient China adopted the method of calculating the year of the sexagenary branch, so that the year can be matched in a certain order without repeating, and for the later generations to study various ancient almanacs and many almanac paintings, the Ganzhi year is also used as an auxiliary means of the year, which is relatively clear, and is an important auxiliary means to understand the lifestyle of the ancient Chinese people.

2. Chronological algorithm of the sexagenary branch

The algorithm mantra is as follows.

Heavenly stem calculation method: the remainder obtained by subtracting 3 by dividing by 10 by the year is the specific stem, and the earthly branch calculation method: the remainder obtained by subtracting 3 by dividing by 12 by the year is the earthly branch word. According to the 12 zodiac signs.

For example, in 2006, the corresponding Tiangan character of 6 is the word C, the remainder of 2006 divided by 12 is 2, and the corresponding earthly branch word of 2 is the word 戌, and the corresponding zodiac word dog is the word, so 2006 is the year of Bingxu, and the zodiac is the dog, that is, the child born after the Spring Festival of this year The zodiac is the dog.

The calculation is as follows:

1) Number the ten heavenly stems and the twelve earthly branches.

2) When calculating, the number of the last digit of the year corresponds to the number of the heavenly stem, and the remainder obtained by dividing the number of years by 12 corresponds to the number of the earthly branch.

For example, in 2011: the last digit is 1, and the corresponding number of the heavenly stem is "Xin Potato Dust", and then divide 2011 by 12 to get 167 and more than 7, and the corresponding earth branch number is "Mao", which is 2011 as the "Xin Mao" year.

The calculation method of the sexagenary branch chronology is as follows, in which the stems can also be located using mantissa numbers.

1. Calculation method:

Heavenly stem = (year-3) The remainder of 10 corresponds to the heavenly stem; Earthly branch = (year-3) The remainder of 12 corresponds to the earthly branch.

The corresponding numbers of the heavenly stems: A1, B2, C3, D4, E5, H6, Hep7, Xin 8, N9, and De0.

The corresponding numbers of the earthly branch: Zi 1, Chou 2, Yin 3, Mao Lao Juexiang 4, Chen 5, Si 6, Wu 7, Wei 8, Shen 9, You 10, Xu 11, Hai 12.

For example, last year was 2022, and the heavenly stem = (2022-3) 10=201 and the remaining 9 and 9 correspond to non, so the heavenly stem is non.

Earthly branch = (2022-3) 12=168 surplus 3, 3 corresponds to Yin, so the earthly branch is Yin.

Therefore, 2022 is the year of Renyin.

Second, the mantissa is determined by the heavenly stem.

A4, B5, C6, D7, E8, H9, Hep0, Xin1, Non2, Dec3.

Then what the digits of the year are, it directly corresponds to what. For example: last year was 2022, and the mantissa was 2, and 2 corresponds to non.

How to calculate the number of months in the sexagenary branch:

Month stem = annual stem number * 2 + month (lunar calendar) (greater than 10 take the mantissa number).

Month: January = Yin, February = Mao, March = Chen, April = Si, May = Wu, June = Wei, July = Shen, August = You, September = Xu, October = Hai, November = Zi, December = Chou. Macro broad.

Annual stem number: A1, B2, C3, D4, E5, H6, Hep7, Xin 8, Non 9, Dec 0.

For example, on May 9, 2022, the number of the year stem of the service is non = 9, so the month stem = 9 * 2 + 4 = 22, and the mantissa is 2, so it corresponds to B. The April branch corresponds to the Si, so it is Otomi.