What is the origin and formulation of the Chinese lunar calendar?

The origin and formulation of the Chinese Lunar Calendar are as follows:

The Lunar Calendar, formerly also known as the Summer Calendar, the Lunar Calendar, and the Old Calendar, is one of the traditional calendars of East Asia. The Lunar Calendar is a yin-yang calendar, in which the average calendar month is equal to one lunar month, but with leap months to make the average calendar year a regression year, and twenty-four solar terms to reflect the changing characteristics of the seasons (the annual movement of the sun's point of direct sunlight), and so has elements of the solar calendar.

Today almost all Chinese people around the world and countries such as Korea, South Korea and Vietnam and early Japan still use the lunar calendar to project traditional festivals such as the Chinese New Year, the Mid-Autumn Festival, the Dragon Boat Festival and other festivals.

From the ancient stem-and-branch calendar to the Western (Gerry) calendar at the end of the Qing Dynasty, history has revised the calendar many times, and China's history has produced more than 102 calendars in one ****, which have had a significant impact on Chinese culture and civilization, such as the stem-and-branch calendar (Regnal calendar), the summer calendar, the Shang calendar (Yin calendar), the weekly calendar, the Western Han dynasty's Taichu calendar, the Santong calendar, and the Sui dynasty's imperial calendar, the Dahan calendar of the Tang dynasty, and so forth. Although they have not been officially used, they have been useful for health care, medicine, thought and scholarship, astronomy, mathematics, and so on.

Advantages of the Lunar Calendar

1. The Lunar Calendar belongs to the yin and yang calendar, which is a calendar that takes into account the relationship between the sun, the moon and the earth. The lunar calendar is a fixed calendar, it has the characteristics of the astronomical calendar, can be very good and a variety of celestial phenomena corresponds to, such as its festival strictly corresponds to the altitude of the sun, the calendar day more strictly corresponds to the moon phase, the frequency of intercalary month does not occur and the frequency of corresponding to the Earth's perihelion and aphelion, and other celestial phenomena such as sunrise sun does not exist,? morning and evening shadow, five-star orientation, solar and lunar eclipses, tides, etc., even the calendar month also roughly corresponds to the sun's altitude.

2, the number of days in the lunar calendar month only 29 and 30 days of two, and by the fixed date of the first day of the stipulation, the human factor is small, not easy to change at will.

3, the first of the year has a strong astronomical significance, with the astronomical significance of the yin and yang years.

4, the yin and yang calendar, the most reflective of the traditional culture of the Han Chinese people of the unity of heaven and man, the harmony of yin and yang.