Cold dewCold dew is a season in late autumn, the beginning of the Xu month in the Ganzhi calendar. Cold dew is a solar term that reflects the characteristics of climate change. Entering the cold dew, there is sometimes cold air heading south, with a significant temperature difference between day and night, and a noticeable dryness in autumn. Minor SnowXiaoxue is the second solar term of winter and the 20th solar term among the 24 solar terms. The time is on November 22nd or 23rd of the Gregorian calendar, when the sun reaches 240 degrees longitude. Winter SolsticeWinter solstice, the 22nd solar term of the 24 solar terms, is the fourth solar term of winter. The Winter Solstice has both natural and cultural connotations. It is not only an important solar term among the 24 solar terms, but also a traditional Chinese folk festival for ancestor worship. snow to the beginning of winterHeavy snow is the 21st solar term in the 24 solar terms and the third solar term in winter. It means the weather will get colder and more precipitation.