1, meaning of slight cold solar term: slight cold is the 23rd solar term among the 24 solar terms, and it is the end of the second month of the dry calendar and the beginning of the ugly month. The time is between 65438+1October 5-7, and the sun is at 285. For China, it's around March 9th, and the slight cold marks the beginning of the coldest day of the year.

2, the source of slight cold solar terms:

(1) The so-called "slight cold" is compared with the last solar term "great cold". "Cold" means cold, which means that it has entered the cold season of the year. At this time, cold air has accumulated for a long time, but it has not reached the coldest degree, so it is called slight cold. "Twenty-four solar terms" says that "the cold is still small at the beginning of the month ... it is big at half a month", that is to say, in the Yellow River basin, the cold at that time was colder than the slight cold. And because the slight cold is still in the last few days of February 9, it will take a few days for the slight cold to enter March 9, and the slight cold in winter corresponds to the slight heat in summer, so it is called slight cold.

(2) In ancient China, slight cold was divided into three stages: "First-class Yanbei Township, second-class magpies started their nests, and third-class pheasants started their lives". The ancients believed that the geese among migratory birds migrated along the yin and yang, when the yang had moved, the geese began to migrate northward; At this time, magpies can be seen everywhere in the north, feeling the yang and starting to build nests; The third time, the word "pheasant" means singing. When the pheasant approaches April 9, it will feel the growth of Yang and sing.