Xiaoxue is the 20th solar term among the twenty-four solar terms and the 2nd solar term in winter, which occurs on the 22nd or 23rd of the Gregorian calendar1/month, that is, when the sun reaches 240 degrees of the yellow meridian. Light snow is a solar term reflecting precipitation and temperature, and it is a solar term with high frequency of cold wave and strong cold air activity. The arrival of the light snow solar term means that the weather will get colder and colder and the precipitation will increase gradually.
The reason why this solar term is called light snow is because "snow" is the product of cold weather. During this solar term, the climate is not deep and the precipitation is not heavy, so "light snow" is used to compare the climate characteristics during this solar term. "Light snow" is a metaphor, which reflects the active cold current and increasing precipitation during this solar term, not a small amount of snow under this solar term.