Which comes first, the severe cold or the slight cold?

Great cold and slight cold, slight cold comes first. According to the experience over the years, slight cold is even colder. However, it is not absolute that slight cold is colder. The temperature will be affected by the cold and warm conditions from early winter to heavy snow, the atmospheric circulation situation in that year, and the occurrence time of strong cold air process. When it appears in the middle, the slight cold will be colder, and when it appears in the later period, the great cold will be colder.

Literally, we can see the difference between them, a "big" and a "small". Because the time is the day before and the day after December in the lunar calendar, it is called December Festival. At the beginning of the month, the cold is small, and in half a month, the cold is big, so there are slight chills and severe chills. There are not many explanations about the origin of the Great Cold in ancient books. Except for the first winter solstice solar term, all other solar terms are recorded in a unified way.