What is the origin of the great cold solar terms? Why is it called the Great Cold?

What is the origin of the great cold solar terms?

The Great Cold is the 24th of the 24 solar terms. Every year, the solar calendar is around 65438+1October 20th, and the sun reaches 300? When it's cold, cold is very cold, and the weather is very cold. The Great Cold is the last of the 24 solar terms. After the extreme cold, spring is coming.

The great cold is the end of the twenty-four solar terms, and it is also the end of winter. You can already vaguely feel the signs of spring coming back. As soon as the Great Cold passed the New Year's solar terms, it came again.

Every cold festival, people are busy removing old cloth, pickling new year's vegetables and preparing new year's goods.

During the Great Cold to beginning of spring, there are many important folk customs and festivals, such as offering sacrifices to stoves and New Year's Eve, and the biggest festival, the Spring Festival, is also in this solar term. The origin of the twenty-four solar terms

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. In BC 104, the taichu calendar written by Deng Ping officially set 24 solar terms in the calendar, and defined the astronomical position of the 24 solar terms.

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, Jing Zhe, Qingming, Long Summer, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Cold Dew, beginning of winter, Heavy Snow and Slight Cold. 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, summer heat, autumn equinox, first 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.