When is the cold dew tomorrow? When is the cold dew in 2022?

Tomorrow 15:22: 16 will usher in the cold dew solar term. At this time, the cold dew is like jade, and the night is as cool as water. In most parts of China, the temperature drop is gradually accelerating, and the temperature difference between day and night is increasing.

The historical origin of cold dew is cold dew, which is the end and the beginning of the full moon in the dry calendar. At night, looking up at the starry sky, you will find that the "Big Mars" (Antares) representing midsummer has sunk into the west. After the cold dew, the height of the sun continued to decrease and the temperature gradually decreased. Cold dew is called "cold dew" because the temperature is much lower than that of Bailu solar terms, and cold produces dew condensation. "Twenty-four solar terms" said: "In September, the dew is cold and will condense." At this time, the temperature is lower than when it is "white dew", with more dew and chill day and night.

There is a proverb in China called "Dew first turns white and then cold", which means that after the dew festival, the dew turns from a little coolness in early autumn to a little coolness in late autumn. There is also a proverb about cold dew: "Cold dew spans three dynasties, and you need to find a bridge after crossing the water", which means that the weather is already chilly and you can't wade across the river or go to the fields barefoot as before. During the cold dew, people can obviously feel the change of temperature difference. From white and crystal dew to freezing cold, it vividly reflects the continuous decline of temperature. As the cold intensifies, everything becomes dim.

The Three Stages of Cold Dew Wu Cheng, a scholar in Yuan Dynasty, compiled Twenty-four Solar Terms, which divided the cold dew into three stages: first-class geese; Second, the sparrow enters the water and becomes a clam; Three chrysanthemums have yellow flowers. It means that 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. "Chrysanthemum has yellow flowers" means that the chrysanthemum is already in full bloom at this time.