Twenty-four solar terms originated from

Twenty-four solar terms originated in the Yellow River Basin.

As early as the Spring and Autumn Period, four solar terms were set, namely, mid-spring, mid-summer, mid-autumn and mid-winter. After continuous improvement and perfection, by the Qin and Han Dynasties, the 24 solar terms had been completely established. Twenty-four solar terms reflect the apparent movement of the sun in one year, so the dates of solar terms are basically fixed in the current Gregorian calendar, with the first half of the year being 6 days and 2 1, and the second half being 8 days and 23 days, with a difference of 1 ~ 2 days. The time required for the sun to travel from zero degrees along the ecliptic to 15 degrees is called a solar term.

It runs 360 degrees every year, and * * * experiences 24 solar terms, twice a month. Among them, the first solar term of each month is the solar term, namely beginning of spring, Jingzhe, Qingming, Changxia, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Hanlu, beginning of winter, Heavy Snow and Xiaohan, with a total of 12 solar terms. The second solar term of each month is Zhongqi, that is, there are 12 solar terms such as rain, vernal equinox, Grain Rain, Xiaoman, summer solstice, great summer heat, early summer heat, autumn equinox, early frost, light snow, winter solstice and great cold. Solar terms and neutral qi appear alternately, each lasting 15 days. Now people collectively refer to them as solar terms.

The historical value of the twenty-four solar terms;

Twenty-four solar terms are not only the time criterion promulgated by successive governments, but also the compass to guide agricultural production and to predict cold, warm, snow and rainy days in people's daily life. Twenty-four solar terms accurately reflect seasonal changes, which are used to guide agricultural activities and affect the food, clothing, housing and transportation of thousands of households. Twenty-four solar terms scientifically reveal the law of astronomical and meteorological changes.

Twenty-four solar terms perfectly combine astronomy, agriculture, phenology and folk customs, and derive a large number of seasonal cultures related to them, which have become an important part of China traditional culture. In the long farming society, the 24 solar terms have played an important guiding role in agricultural activities and have rich cultural connotations. Some important solar terms such as beginning of spring, Winter Solstice and Qingming also have interesting folk customs, such as "biting spring" and "hiking".