The relationship between four seasons, eight festivals and twenty-four solar terms, the same one?

Sixty-year-old periodic calendar

The solar calendar is a unique solar calendar in China, w

The relationship between four seasons, eight festivals and twenty-four solar terms, the same one?

Sixty-year-old periodic calendar

The solar calendar is a unique solar calendar in China, which was put forward by some scholars in the early Song Dynasty. Don't use the new moon as the standard for dividing months, but use solar terms, starting from beginning of spring and starting from festivals. When you get old, you will return to that year, and one section is a month.

Detailed explanation

The year, month and day of the solar calendar are determined by the apparent motion of the sun, and have nothing to do with the new moon. However, the solar calendar is different from the general solar calendar (for example, the Gregorian calendar is the Gregorian calendar), and the length of the latter month is artificially specified, which has nothing to do with the astronomical phenomena. The solar calendar is calculated according to the astronomical phenomena.

The solar calendar is a calendar derived from the twenty-four solar terms of China's traditional calendar (Han calendar, Xia calendar, Huang calendar or Lunar calendar).

Solar terms reflect the different positions of the earth in the orbit around the sun and belong to the solar calendar category.

Seen from the earth, the sun moves along the orbit (ecliptic) on the celestial sphere. In ancient China, it was found that the change of solar year position was closely related to agricultural climate. Therefore, in the calendar, 24 solar terms are compiled by using astronomical phenomena to reflect climate change and facilitate the arrangement of farming. Divide the ecliptic (360) of the sun into 24 equal parts. Every time the sun runs 15 from the vernal equinox, it is called a solar term, and the moment of equal parts is the moment when the solar terms cross. Each solar term has a special name, which contains the significance of climate change, phenological characteristics and crop growth.

Twenty-four solar terms are developed on the basis of four seasons and eight festivals. The turn of the Yin and Zhou Dynasties has been divided into four seasons, and the Spring and Autumn Period has been divided into eight sections. By the end of the Warring States period, a complete system of 24 solar terms had been formed (the astronomical position had been determined). By the time of the Western Han Dynasty, the names and order of the 24 solar terms in Huainanzi were completely consistent with those of later generations, and remained unchanged for more than two thousand years: beginning of spring, Rain, Sting, Equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu, Dashu, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, First Frost and Autumn Solstice.

In order to facilitate memory, Song has 24 solar terms.

The spring rain shakes the spring and clears the valley, and the summer is full of mountains and summers.

Autumn dew, autumn frost, little snow in winter and cold in winter.