Which solar term does the Asian Year stand for?

"Year-divided" refers to the winter solar terms on the solstice. The winter solstice is not only an important solar term among the 24 solar terms, but also a traditional folk festival in China. The custom of winter solstice varies in content or details due to different regions. In southern China, there are customs of offering sacrifices to ancestors and enjoying the winter solstice. In northern China, it is a custom to eat jiaozi from winter to Sunday every year.

As early as more than 2,500 years ago in the Spring and Autumn Period, China had observed the sun with the earth, and determined the winter solstice, which was the earliest of the 24 solar terms, and the time was between 0 and 23 in Gregorian calendar 65438+February 265438. After the solstice of winter, the stars in the night sky were completely replaced by the stars in winter. From this day on, they began to "enter the ninth".

From winter to the sun, the sun has the lowest height and the shortest sunshine time, and the heat absorbed by the ground is more than the heat lost. After the winter solstice, it begins to count to nine, and every nine days is a "nine". The heat accumulated on the ground around March 9 is the least, and the weather is the coldest, so it is said to be "cold on March 9", while September 9 is already 1 and February in the summer calendar, and most parts of China have entered spring, so it is "sunny on September 9".

Astronomy regards the winter solstice as the beginning of winter, which is obviously late for most parts of China. During the winter solstice, the average temperature in the northwest plateau is generally below 0℃, while it is only about 6℃ to 8℃ in the south. However, in the southwest low-altitude valley area, even in the coldest local165438+ in early October, the average temperature is still above 10℃.