What do you mean by two winters in winter snow?

Winter snow refers to light snow, and snow winter refers to heavy snow.

Xiaoxue: The longitude of the sun is 240, which means it's starting to snow. The Gregorian calendar is165438+1October 22-23.

Heavy snow: the longitude of the sun is 255, the snowfall increases, and there may be snow on the ground. Gregorian calendar is 65438+February 6-8.

Twenty-four solar terms are special festivals in the dry calendar, indicating the change of natural rhythm and establishing "December construction". At first, it was based on the movement of stars. The Big Dipper rotates circularly, and bucket handle rotates around the east, south, west and north, which is called one of the "years old" (Figure). Each rotation cycle begins in early spring and ends in severe cold. The current "twenty-four solar terms" are formulated according to the position of the sun on the return to the ecliptic, that is, the annual movement track of the sun is divided into 24 equal parts, each 15 is 1, and each 1 is a solar term, starting in beginning of spring and ending in severe cold.