Introduction: When we query the calendar, we will see two representation methods, one is the digital version of the Gregorian calendar year representation, and the other is the text version of the lunar calendar year representation. The Gregorian calendar year is increased by one every year, but the lunar calendar year is are different, and the calculation method is called the stem and branch chronology. So, how to calculate the zodiac year? What is the simple algorithm formula for the stem and branch chronology? Come with me and check it out.
How to calculate the stem and branch chronology
The first method: first code the heavenly stems:
A, B, C, D , Wu, Ji, Geng, Xin, Ren, Gui
4, 5, 6, 7, 8, 9, 0, 1, 2, 3
Any year after AD The last digit (single digit) of is "4", then the Heavenly Stem of that year is "A"; "5" is "B"; and so on. For example, the Heavenly Stem in 2003 is "Gui". It is very practical to remember this code. Although we cannot directly calculate the AD year using the chronology of the stems and branches, it can give us a hint. The last digit of the AD year in which the heavenly stem is "A" must be "4"; "Xin" is "1"; and so on. For example, the last digit of the years when the Xinyou Coup (1861), the Xin Chou Treaty (1901), and the Revolution of 1911 (1911) took place was all "1", and "1" just corresponds to the xin in the heavenly stems.
Famous Years of Stems and Branches in Chinese History
Many major events in Chinese history are named after the stems and branches of the years: Xinyou Coup (Qixiang Coup), Sino-Japanese Sino-Japanese War of 1898-1898, Wuxu Reform (Hundred Days Reform), Gengzi Indemnity, Xinchou Treaty, Guimao School System, Revolution of 1911, etc.
The reason is that the "AD Calendar" was not used at that time, and the "AD Calendar" did not come into use until the founding of the Republic of China on New Year's Day in 1912.
(1) Xinyou Coup - occurred in 1861, the year of Xinyou in the lunar calendar, when Empress Dowager Cixi seized power.
(2) The Sino-Japanese War of Sino-Japanese War - occurred in 1894, the year of Sino-Japanese War in the lunar calendar, during the Yellow Sea War between China and Japan.
(3) The Reform Movement of 1898 - occurred in 1898, the year of 1898 on the lunar calendar, and lasted only 103 days.
(4) Gengzi Indemnity - occurred in 1900, the year of Gengzi in the lunar calendar, when the Eight-Power Allied Forces attacked China.
(5) Xin Chou Treaty - occurred in 1901 and was signed in the Xin Chou year of the lunar calendar, which completely reduced China to a semi-colonial and semi-feudal society.
(6) Guimao Academic System - This took place in 1905, the year of Guimao in the lunar calendar. It was the last academic reform in the late Qing Dynasty and the imperial examination system was abolished.
(7) Revolution of 1911 - occurred in 1911, the year of 1911 of the lunar calendar, and the uprising overthrew the rule of the Qing Dynasty.
Then code the earthly branches:
Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, Hai
4, 5, 6, 7, 8, 9, 10, 11, 0, 1, 2, 3
Divide the number of a certain year AD by 12, the remainder is "4", then the number of that year The earthly branch is "Zi"; the remainder "5" is "Chou"; and so on. To calculate the earthly branches mentally, you can subtract the multiple of 12 from the year number, such as 1800, 1860, 1920, 1980, etc., and then the calculation will be much easier.
Finally, the heavenly stems and earthly branches are combined together to form the stem and branch calendar for a certain year AD. For example, in 1861, the last digit is "1", the heavenly stem is "Xin", divide 1861 by 12 (or 1861 minus 1860), the remainder is "1", and the earthly branch is "unitary", then 1861 AD is Xin You year
The specific year, month, day and time can be calculated based on the sixty-year period.
In the use of timekeeping, since a day has twenty-four hours, which happened to be twelve o'clock in ancient times, a conversion relationship of two hours and one hour is formed. Specifically, from 23 o'clock in the middle of the night to 1 o'clock in the middle of the night, it is midnight, and from 1 to 3 o'clock, it is midnight. Chou hour, 3-5 o'clock is Yin hour, 5-7 o'clock is Mao hour, 7-9 o'clock is Chen hour, 9-11 o'clock is Si hour, 11-13 o'clock is Noon hour, 13-15 o'clock is Wei hour, and 15-17 o'clock is Wei hour. Shen Shi, 17-19 o'clock is You Shi, 19-21 o'clock is Xu Shi, and 21-23 o'clock is Hai Shi. In addition to this timekeeping, the earthly branch timing method is also connected with the stem and branch day counting method to form the sixty stem and branch timing method, that is, the day of Jiaji starts with A, which becomes the time of Jiazi, then the time of Chou becomes the time of Yichou, and the time of Yin becomes the time of Bingyin, and so on. analogy. Days in Yigeng begin with C and become Bingzi hours; days in Bing and Xin begin with Wu and become Wuzi hours. The day of Ding and Ren begins with Geng, which becomes Gengzi hour; the day of Wugui starts with Ren, which becomes Renzi hour. In this way, the sixty heavenly stems form a complete method of recording years, months, days, and time. When each person is born, there is a certain birth date composed of four groups of eight heavenly stems, referred to as "eight characters". This time is exactly 19:07 on November 15, 2005 (the fourteenth day of the tenth month of the lunar calendar). The horoscope of the person born at this time is Dinghai, month Guimao, day Renxu, Yiyou year (because the day stem starts with Gui, so this day The time is Renzi time, and it is estimated that the time from 19:00 to 21:00 is Renxu time).
Method 2: Formula method:
1. The formula for calculating AD years is; "First subtract three from the AD years, and the remainder after division by 10 is the Heavenly Stem. The base number is divided by 12, and the remainder is It’s the Year of the Earthly Branches.” Take 1911 as an example. Subtract 3 from the year to get the base number 1908. Divide by 10 to get the remainder 8. Check the order of the heavenly stems (A, B, C, Ding, Wu, Ji, Geng, Xin, Ren, Gui). To get "Xin", divide the base number 1908 by 12 exactly, and the remainder is 0 (which can be understood as 12 before 1). Then check the order of the earthly branches (Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, Hai) got "Hai", so 1911 was the year of Xinhai.
2. To calculate the year in BC, "Add three to the year in BC first, and the remainder after dividing by 10 is the heavenly stem. The base number is divided by 12, and the remainder is the year of the earthly branches." When checking the order of stems and branches, just check from back to front. Taking 40 BC as an example, add 3 to the year to get 43 as the base number, divide by 10 to get the remainder 3, look up the heavenly stems as "Xin", then divide the base number by 12 to get the remainder 7, look up the earthly branches as "巳", so 40 BC should be the year of "Xinsi".
Among them, the conversion between the AD year and the stem and branch calendar is a difficult point. For example: What year in the stem and branch calendar is 2004 AD? Here is a relatively simple calculation method.
(1) First, remember the ten heavenly stems and twelve earthly branches (2) Then remember the year of the AD and the year of the stems and branches of a historical event. For example, the Revolution of 1911 was in 1911. . Then you can use this as a reference point to calculate. For example: I know that 1911 is the year of Xinhai, and I ask you which year 2004 is the year of Ganzhi? The calculation steps are as follows: (1) First 2004-1911=93 (2) Then 93÷10=9 remainder 3, use this remainder 3 to determine Tianqian. (That is, if there is no remainder, then the Heavenly Stems in 2004 will be the same as the Heavenly Stems in 1911, which is "Xin"; if the remainder is 1, then the Heavenly Stems in 2004 will be the last word of "Xin" in the Heavenly Stems in 1911, that is, It is "Ren". And so on) that is, the Tiangan in 2004 is the third character after "Xin", which is "Jia". (2) Use 93÷12=7 with a remainder of 9, and use this remainder 9 to determine the earthly branches. (The method is the same as above) That is to say, the Earthly Branches in 2004 is the ninth character after "Hai", which is "Shen" (3) Combining the heavenly stems and earthly branches, the year of the stems and branches in 2004 is the Jiashen year.
Simple algorithm formula of stem and branch chronology
10 Heavenly Stems: A, B, C, Ding, Wu, Ji, Geng, Xin, Rengui
12 Earthly Branches: Zichou, Yinmao, Chen, Siwu, Wushen, Youxuhai
The universal formula for calculating the chronology of Heavenly Stems and Earthly Branches:
Calculation method for Heavenly Stems: The remainder obtained by subtracting 3 from the year and dividing it by 10 corresponds to the character for Heavenly Stem
Earthly Branches Calculation Method: The remainder obtained by subtracting 3 from the year and dividing it by 12 corresponds to the Earthly Branches character.
Example: 2011
Calculation of Heavenly Stems: (2011- 3) The remainder of /10 is 8, which corresponds to the Heavenly Stem: Xin, which is the stem of this year.
Calculate the earthly branches: (2011-3) The remainder of /12 is 4, and the corresponding earthly branch is: Mao, which is the branch of this year.
So 2011 is the year of Xin Mao.
For example: the Sino-Japanese War of 1894-1894, and the year 1900 when the Eight-Power Allied Forces invaded China should be: the Year of Gengzi.