Why do people in China use the lunar calendar?

China's lunar calendar system was formulated according to the domestic climate from the beginning, so the lunar calendar is irreplaceable for China people.

Lunar calendar is a traditional calendar in China, and it also has names such as lunar calendar, summer calendar, Han calendar and Han calendar. From the dry year of ancient times to the opening of the solar calendar in the late Qing Dynasty, it was revised many times in history, and there were many kinds of calendars in China, which had a great influence on the culture and civilization of China.

For example, the official calendar (photo), the summer calendar, the Shang calendar (lunar calendar), the weekly calendar, the taichu calendar calendar in the Western Han Dynasty, the three-way calendar, the emperor calendar in the Sui Dynasty, the Dayan calendar in the Tang Dynasty and so on. Although some calendars are not officially used, they have played a role in medical care, medicine, ideology, astronomy, mathematics and so on.

Extended data:

Twenty-four solar terms are the 24 solar terms of the calendar, twice a month. Twenty-four solar terms take the earth's revolution around the sun as a cycle, which basically summarizes the different positions of the sun on the ecliptic at different times of the year, the exact time of cold coming and summer going, the laws of natural phenomena such as rainfall and snowfall, and the time of recording some phenological phenomena in nature.

Twenty-four solar terms were originally determined according to the direction of the top of the bucket handle of the Big Dipper. Later, for a period of time, it evolved into the method of "leveling the qi" and then the method of "fixing the qi" to determine the solar terms, which has been in use ever since. The "constant gas method" is formulated according to the position change of the earth on the ecliptic (that is, the orbit of the earth around the sun), and each corresponds to a certain position reached by the sun every time it runs 15 on the ecliptic.

Twenty-four solar terms were established in ancient times, and were absorbed into taichu calendar law in the Han Dynasty as a supplement to the calendar guiding agriculture. Solar terms are an integral part of the lunar calendar and express the apparent movement of the sun. Through the 24 solar terms, the lunar calendar can accurately reflect the changes of the four seasons throughout the year, which is convenient for people's production and life and agricultural farming. The month of the lunar calendar basically corresponds to the twelve qi, and the twelve solar terms can appear in the second half of last month and the first half of this month.

Baidu encyclopedia-lunar calendar