What is the origin of solar terms in beginning of winter?

The origin of beginning of winter can be traced back to the ancient farming culture in China.

In ancient times, people's lives and agricultural production were closely related to the weather. Beginning of winter is a solar term, and it is an important time node for farmers in ancient China to cultivate in winter. In ancient times, farmers would store grain and fuel for use in winter at the beginning of winter, while farming in winter. Spiny insects tend to creep, which means that dormant insects begin to go underground; Winter closure means that animals begin to hibernate and plants begin to hibernate; When water begins to freeze, water ice also begins to freeze.

These phenomena are all important features of solar terms in beginning of winter. Beginning of winter is the19th solar term among the 24 solar terms in China, and it is celebrated on the 7th or 8th of the Gregorian calendar1October every year. Beginning of winter is the beginning of winter and the first solar term in winter. The arrival of beginning of winter marks the gradual decline of temperature and cold weather, and the earth has entered a new season.

Brief introduction of meteorological changes in early winter

In early winter, the sun has reached the longitude of 225 degrees, the sunshine time will continue to be shortened, the height of the sun will continue to decrease at noon, and the amount of solar radiation obtained by the northern hemisphere will be less and less, but there is still some energy in the heat stored on the surface in the second half of this year. Because there is still "accumulated heat" on the surface, it is usually not very cold in early winter, and the real cold is after the winter solstice. Due to the large span between north and south in China and the great climate difference between north and south, the winter with this climatic significance is obviously late for some parts of China.

After winter, the climate changes from dry autumn to rainy and cold winter. In southern China, sunny, warm and comfortable "Xiaoyangchun" weather often appears from beginning of winter to Xiaoxue. There is a folk saying that "it's sunny in October". As the saying goes, "it's warm in August and warm in September, and it's sunny in October".