How to calculate the chronology of heavenly stems and earthly branches?

The calculation methods of trunk and branch chronology include calculation formula, traditional trunk and branch chronology, and ground branch calculation method.

1, calculation formula

Chronology of trunk and branch is a symbol that uses heavenly stems and earthly branches and its combination to express time. The chronology of trunks and branches is related to solar terms and solar terms in the traditional calendar of China, and there are specific calculation formulas. The specific calculation method is as follows: Jiazi, Yechou, Bingyin, Ding Mao and Chen Wu have five years, and heavenly stems and earthly branches has one cycle: Jiazi = 12 Jiazi +24 JOE +24 Yihai. Every day is a week, that is, a week has 12 weeks. In Chen Wunian, it was May, which was a year of shame and ugliness.

2. Chronology of traditional cadres and branches

The traditional chronology of trunk and branch takes three numbers, A, B and C, as the "first group" and "second group" of chronology. The traditional chronology of trunk and branch calculates time according to the corresponding relationship between trunk and branch and time. For example, A is in Jiazi, then B is in Hai (Ugly), so the year of Ugly B in the Sino-Japanese War is determined as Jiazi, Jiayin,. Take each Jiazi as a cycle, and each branch corresponds to one hour.

3, the ground support calculation method

The year minus 3 divided by 12, the corresponding branch is the branch. Just follow the 12 zodiac sign. For example, in 2006, the heavenly stem character corresponding to 6 was C, and the remainder when it was divided by 12 in 2006 was 2, and the earthly branch character corresponding to 2 was Xu, and the corresponding zodiac character was dog, so in 2006, the zodiac was a dog, that is, the children born after the Spring Festival this year were dogs.

The starting point of annals of cadres and party branches;

At the beginning of the Eastern Han Dynasty, people had already used the dry calendar in the period of Emperor Guangwu Liu Xiu. The calendar year of Ganli was extended to the second year of Emperor Han and Yuan (AD 85), and it was promulgated in the form of a decree throughout the country. Later, all dynasties and generations adopted the year number, taking the dry branch method as the year number, and it was not abolished along the line. In the pre-Qin period, China had a tradition of "changing course", that is, the emperor decided the end of the year by decree.

According to the Book of Rites, "a reformer who is powerful, examines articles, is original, easy to change colors, wears different emblems, has different clothes and benefits the people." Kong Dui said, "This is the beginning of a year and the beginning of the first day of junior high school. To say that the king has the right to rule means that we should start with me, change the old and use the new, and build with yin, ugliness and children. Zhou Zi, Yin Chou, and also corrected them.

In the middle of the week, Yin and Xia Pingdan are talking easily. "The three generations of pre-Qin have a tradition of correcting the new moon. Summer thinks that it is right, business takes simplicity and ugliness as right, and Zhou takes Jane as right. After the Qin dynasty unified the world, it inherited this tradition, starting from the construction of the sea (October). Qin zhengshuo was followed in the early Han dynasty, and his own zhengshuo was established in the period of emperor Wu of Han dynasty.