How to determine a few years in ancient times?

In ancient times, China used branches or year numbers to mark years, while in the west, the solar calendar was used. Today, the Gregorian calendar takes the year when Jesus was born as the first year of the year, but in ancient China, the year was not specified.

1, and (Gā nzh: and) chronology is a chronology method that has been used since ancient times in the history of China. The trunk is heavenly stems and earthly branches's floor. The order of matching branches is 60, which is recorded repeatedly, which is commonly known as "branch table".

The ten symbols of A, B, C, D, E, Ji, G, Xin, Ren and Gui are called Tiangan; The twelve symbols of Zi, Ugliness, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai are called earthly branches.

People's Republic of China (PRC)'s national standard GB/T 3366 1—20 17 "Compilation and Promulgation of Lunar Calendar" stipulates that the year of Ganzhi and Zodiac shall be counted from 0: 00 on the first day of the first month.

2. Year, year and year were the names used by the ancient emperors of China to record the years. The use of the year number began in Emperor Wu of the Han Dynasty. During the reign of Emperor Wu of the Han Dynasty for 54 years, * * * used a title of 1 1, but the previous five titles of Jianyuan, Yuanguang, Yuanshuo, Yuanshou and Ding Yuan were added later, and the first title he personally decided was "Yuanfeng". 11year BC, that is, he ascended the throne in the summer of 30 years, and the following year was designated as "the first year of Yuanfeng" by the imperial edict. From then on, as soon as the new emperor ascended the throne, he must determine his title. Before the Yuan Dynasty, an emperor generally had multiple titles. During the Ming and Qing dynasties, an emperor basically used a title, that is, one yuan for a lifetime. Chronology is not only a kind of chronology in China, but also affects Korea, Japan and other countries.

3. A.D., the Gregorian calendar era, was originally called the Christian era, also known as the Gregorian calendar or A.D., a method of chronology that originated in western society. This is a calendar made by Italian doctor and philosopher aloysius Lilius, who reformed julian calendar. 1582, the then Pope Gregory XIII approved its promulgation.

It began in the year when Jesus was born. In julian calendar and Gregorian calendars, the date after the birth of Jesus is called the principal year, Anodomini (AD) (Latin). Before the birth of Jesus, it was called "BC". However, in order to dilute its religious color and avoid causing antipathy among non-Christians, modern scholars mostly change its name to Common era (abbreviated as C.E.) before Common Era (abbreviated as B.C.E).