What is the coldest solar term in a year?

The coldest of the 24 solar terms is the slight cold solar term.

There is a saying in northern China that "slight cold is better than severe cold, which is common but not uncommon", meaning that the solar terms of slight cold are colder than those of severe cold, which is nothing unusual.

Slight cold usually occurs from February 9th to March 9th, which is the coldest time of the year in northern China. After the slight cold, the temperature of the great cold rose slightly. The coldest in southern China is in April and September, which is colder than in March and September. In April and September, during the solar terms of the Great Cold, the Great Cold in the south of China is colder than the Slight Cold.

Phenological phenomenon

In ancient China, the "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 word "pheasant" means singing. As April 9th approaches, pheasants can sing.

Due to the large geographical span between north and south of China, different regions will have different production and cultivation for the same slight cold solar terms. In the north, in most areas, there is not much farm work in the fields, and all of them have winter holidays. The main task is to do a good job of keeping warm in vegetable pits and sheds, and to make fertilizer and accumulate fertilizer at home.

Winter fertilizer should be applied to wheat, rape and other crops in southern China, while in Hainan and most parts of southern China, it is mainly to do a good job in cold and antifreeze, store fertilizer and build water conservancy projects. Slight cold and severe cold are the periods with the least rainfall in a year.