"September Festival, dew is cold, it will condense" which solar term is described?

"September Festival, cold dew will condense" describes cold dew. In the cold dew season, farming activities are still busy. "Everyone is busy in the cold dew season, planting wheat and picking flowers and hitting the bean fields." "When the cold dew is first frosted, planting wheat is busy day and night." "When the cold dew is cold, cutting late rice."

Cold dew is a solar term reflecting the characteristics of climate change, and "cold" refers to cold. It can be seen from the literal meaning that the weather has obviously turned cold at this time. Compared with the white dew, the temperature has dropped a lot, and the dew on the ground is colder, which is likely to become frozen dew, so it is called cold dew. Generally speaking, the cold dew season falls on1October 8 or 9 of the Gregorian calendar every year. On a cold dew day, the sun reaches 195 degrees.

The origin of cold dew.

In the cold dew season, Nanling and the vast area to the north have entered autumn, and the northeast and northwest regions have entered or are about to enter winter. In the capital Beijing, you can see the first frost in many years. In addition to the perennial snow on the Qinghai-Tibet Plateau, it has generally begun to snow in the northeast and northern Xinjiang.

In China, the cold dew is divided into three stages: "The first stage is the swan goose; Second, the sparrow enters the water and becomes a clam; Three chrysanthemums have yellow flowers. " In this solar term, geese move south in a line or herringbone queue; In the cold late autumn, all the birds disappeared. The ancients saw a large number of clams suddenly appearing on the seashore. The stripes and colors of shells were very similar to those of birds, and they thought they were birds. The third stage of "Chrysanthemum begins to blossom" means that the chrysanthemum has opened in a large area at this time.