Snow is the 20th solar term among the 24 solar terms, and the second solar term in winter. It occurs on November 22nd or 23rd of the Gregorian calendar, when the sun reaches 240 degrees longitude. Snow is a solar term that reflects precipitation and temperature, and it is a solar term with high frequency of cold waves and strong cold air activities. The arrival of the Little Snow Festival means that the weather will become colder and the precipitation will gradually increase.
Snow "is a product of cold weather, so" light snow "is used to describe the climate characteristics of" the climate is not deep enough and the precipitation is not heavy "during this solar term. The "Little Snow" solar term reflects the trend of temperature and precipitation changes, and does not mean a small amount of snow under this solar term. The "Little Snow" solar term is not necessarily related to the "Little Snow" in the weather.
The "Filial Piety Classic" states: "Fifteen days after the beginning of winter, Douzhi Hai is called light snow. The sky and earth accumulate yin, and temperature is called rain, while cold is called snow. When the time is small, the cold is not deep and the snow is not heavy." The light snow solar term is a climate concept that represents the climate characteristics during the light snow solar term. Climate factors include precipitation, temperature, light, etc. Among them, precipitation is an important factor in climate. Light snow is a solar term that reflects the trend of temperature and precipitation changes. Meteorology refers to the condensation of water vapor such as rain, snow, and hail that falls from the sky to the ground as "precipitation". The name "light snow" is used to describe the climate characteristics during this solar term, as "snow" is a product of cold weather and the climate during this solar term is not deep and there is not much precipitation. The arrival of the Little Snow Festival means that the weather is getting colder and the precipitation is increasing.