When is the solar term of the 23-year cold?

The solar terms are 65438+1October 20th, 2023 and 19: 00.

The Great Cold is the last of the 24 solar terms, and it is called "Great Cold" every year when the sun reaches 300 degrees on June 20-2 1 day of the Gregorian calendar.

During the Great Cold Festival, although the day is slightly longer than the winter solstice, the day is still shorter and the night is longer. The heat radiated from the sun to the ground is less than that radiated from the ground to the air, so the temperature keeps dropping. In addition, cold waves from the polar regions, Siberia and the Mongolian Plateau frequently go south at this time, constantly invading vast areas of China and promoting the emergence of the lowest temperature throughout the year.