What is the origin of beginning of winter?

"beginning of winter" is165438+1October 7th or 8th every year, which is19th of the 24 solar terms. In ancient China, people used to regard beginning of winter as the beginning of winter. "Twenty-four solar terms" said: "Foundation is also the beginning", and said: "Winter is also the end, and everything is also the harvest." It means that the crops in autumn are harvested and put into storage, and the animals are hiding and hibernating. It seems that the beginning of winter does not just mean the coming of winter. In a word, beginning of winter means that when winter begins, everything will be collected to keep out the cold.

Beginning of winter and beginning of autumn are the same. The ancients also used divination to see the warmth and coldness of winter in this season, such as "beginning of winter is sunny and one winter is cold (cold); Early winter is cloudy (rainy), and one winter is warm (warm winter). There are no exceptions. In ancient times, on the day of beginning of winter, the emperor personally led the doctors of three public officials to the northern suburbs to welcome the winter.

In ancient China, beginning of winter was divided into three stages: the beginning of still water and ice; The second waiting place began to freeze; The pheasant drowned three times. "This kind of solar water can already form ice; The land also began to freeze; In the third stage, pheasant refers to a big bird like pheasant, and pheasant is a big clam. After beginning of winter, big birds like pheasants are rare, but you can see big clams with similar lines and colors at the seaside. Therefore, the ancients thought that pheasants would become big clams in early winter.

In early winter, the sun has reached the longitude of 225, and the amount of solar radiation obtained by the northern hemisphere is getting less and less. At this time, there is still some heat storage on the surface in summer, so it is generally not too cold. When there is no wind on a sunny day, there is always warm and comfortable "Xiaoyangchun" weather, which is not only very pleasant, but also very beneficial to the growth of winter crops. But at this time, the cold air in the north also has a strong force, often invading the south frequently, and sometimes it will form a cold wave weather with strong winds, cooling rain and snow.