How is the lunar calendar in China drawn up?

Lunar calendar: China created the "Seven Leaps in Nineteen Years" in the Spring and Autumn Period. The method is that on the basis of the pure lunar calendar, seven out of every 19 years are regarded as leap years, and one more month in leap years is thirteen months. For example, in the year of Guihai, there are only 12 months, 354 days, and the year of Jiazi, there are 13 months and 384 days in a year. As a result of this arrangement and adjustment, the calendar not only reflects the moon's waxing and waning, but also adapts to the cold and hot climate changes brought by the solar calendar. This calendar is actually a combination of yin and yang, referred to as yin-yang calendar. The lunar calendar we are using now is such a lunar calendar. Some people call the lunar calendar the lunar calendar, which is wrong. Gregorian calendar: Gregorian calendar originated from julian calendar in ancient Rome, and its appearance is directly related to the development of Christianity in Europe. According to legend, Jesus was resurrected three days after he was crucified, which happened to be spring. The days when early Christians celebrated Easter varied from place to place, which was quite chaotic. Easter is the first Sunday after the full moon at the vernal equinox. As time goes on, the vernal equinox slowly approaches winter. In order to bring Easter back to spring, Pope Gregory XIII reformed julian calendar according to the plan put forward by astronomers. The revised julian calendar is called Gregorian calendar, which is a pure solar calendar based on the annual movement of the sun, so it is commonly known as solar calendar. It not only solves the problem that Easter does not conform to the weather, but also has high accuracy.

For example, on the first day of the first month, the Spring Festival is commonly known as "New Year's Day" and formerly known as "New Year's Day". Du Taiqing of Sui Dynasty said in "Five Candles Collection": "The first month is the end of the month, and the first day is the January day, which is also a cloud." The original meaning of "yuan" is "head" and later extended to "start" Because this day is the first day of the year, the first day of spring and the first day of the first month, it is called "Sanyuan". Because this day is still the old dynasty, the moon dynasty and the Japanese dynasty, it is also called the "three dynasties"; Because it is the first Shuori, it is also called "Yuanshuo". On the first day of the first month, there are other nicknames such as Shangri-La, Zheng Chao, Sanshuo and Shisan, meaning that the first day of the first month is the beginning of the year, month and day.

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