Why is the Great Cold the last of the 24 solar terms?

The Great Cold is the last of the 24 solar terms. Fighting refers to ugliness; The solar meridian reaches 300; Celebrate on the calendar of 65438+1October 20-2 1 every year. Great cold, like slight cold, is a solar term indicating the degree of cold weather, and great cold refers to extremely cold weather. The great cold solar term is from March 9 to April 9, and the cold wave frequently goes south, which is the coldest season of the year.