What's the name of the solar term?

That is, the time when the sun runs along the longitude of the Yellow River from zero 15 degrees is called "a solar term".

Running at 360 degrees every year, * * * experiences 24 solar terms twice a month, with the first solar term as "solar term", such as beginning of spring, Jing Ke and Qingming. And the second solar term is "Zhong Qi", such as rain, vernal equinox and Grain Rain. , "solar terms" and "neutral gas" appear alternately, each lasting 15 days.

Solar term month:

"Twenty-four solar terms" and "Twelfth Construction" are the basic contents of the cadre calendar, and the Twelfth Construction is a solar month based on the twenty-four solar terms. Taking the direction pointed by the Big Dipper bucket handle as the standard for determining the month is called sword fighting. Bucket handle rotates clockwise once, which is called "one year old". Every year at the age of 18, bucket handle rotates, pointing to the twelve days in turn, which is called "December Construction".

The buildings in December are: Yin in the first month, Mao in February, Chen in March, Si in April, Wu in May, Wei in June, Shen in July, You in August, Xu in September, Hai in October, Zi in November and Ugly in December.

The division of "December Construction" is based on solar terms, namely, beginning of spring, Jingzhe, Qingming, Changxia, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Hanlu, beginning of winter, Daxue, and Xiaohan are regarded as silver moon, Uzuki, Chen Yue, Mitsuki, Noon, No Bud, Shen Yue, Moon and Xu Yue respectively. In ancient times, the basis for establishing solar terms was "changing stars" (bucket handle Point).

The current solar terms are established based on "the annual apparent movement of the sun" (the degree of the yellow meridian); Although the two methods are different, the cause of the struggle is that the earth revolves around the sun, so the intersection time of the two methods is basically the same.