From which dynasty did China begin to use December?

. In the Xia, Shang and Zhou Dynasties two or three thousand years ago, there was a method to record the year, month and day with the change of the astrological orientation referred to by Beidou bucket handle. This is the prototype of the calendar. The first month of each year is called the first month, which is the beginning of the year. Because the calendars used in different dynasties are different, the beginning of a year is different. The first month of the summer calendar is the lunar (agricultural) month we are using now, which is also called "the lunar month on the floor"; In Shang Dynasty, the December of the lunar calendar is now the beginning of a year, which is the so-called "ugly winter moon". The weekly calendar begins in November of the current lunar calendar, which is the so-called "mid-winter month"; The Zhuan Xu calendar was used in the Qin Dynasty, with October of the current lunar calendar as the beginning of the year, which was called the "Moon of Building and Winter". In the early Han dynasty, the Qin calendar was still the standard. It was not until Emperor Wu of the Han Dynasty organized a special team to change the Zhuan Xu calendar to taichu calendar and bring the 24 solar terms into the calendar. The first month of the summer calendar is still the beginning of the year. This is why we still call the lunar calendar (agriculture) the summer calendar. Guo Shoujing's Chronology Calendar takes 365.2425 days a year, which is completely consistent with the average length of a year in the current Gregorian calendar. The service calendar is published in1281; The current Gregorian calendar was put forward by Italian Rilio only in 1576. Chronological calendar is indeed a very progressive calendar in ancient China. Guo Shoujing finalized this calendar and passed it on to future generations, as well as many advanced scientific achievements.

The word "nian" appeared in the Zhou Dynasty. Before this, Yao and Shun called it "carrying", which means that celestial bodies and stars carry a week. In the Xia Dynasty, it was called "Nian", which means that people are one year older and the Spring Festival is coming. Shang dynasty called it "sacrifice", which means it's past four o'clock. It's time to make history books and worship the ancestors of the gods. Although the word "year" was once changed to "year" in Tang Suzong, the period is very short, also called "year". Year is a unit of time, which has been used until now. A cycle of spring, summer, autumn and winter is called a year. The word "zai" appears from time to time in written language, which is obviously influenced by ancient appellations.

This year's name

Year: year, star, frost, cold and heat, spring and autumn.