After which solar term, will the weather get cold?

Zhao Zhi Heng, director of Tianjin Astronomical Society, said that the winter solstice is one of the earliest solar terms in China, which was called "short day" or "short day" in ancient times, and the time was basically between the solar calendar 65438+February 265438+February 0-22, when the solar longitude was 270 degrees. On the solstice of winter, the sun shines almost directly on the tropic of Capricorn, with the shortest day and the longest night in the northern hemisphere. After this day, the sun gradually moves northward, and the days will get longer and longer.

After the winter solstice, the climate in all parts of China has entered the coldest stage, which is often called "nine cold".

"Meteorological data show that there is strong cold air going south from winter to around every year, resulting in a sudden drop in temperature. Therefore, people should pay attention to keeping warm, preventing diseases and protecting health at this time. " Zhao Zhi Heng warned.

Extended data:

The winter solstice is not only an important solar term in the China lunar calendar, but also an important traditional festival of the Chinese nation. Ancient people thought that the solar terms from the winter solstice were the starting point for calculating the 24 solar terms in China. Because the solstice of winter is coming, the New Year is just around the corner. Therefore, the ancients believed that the solstice in winter was as important as the New Year. There is a saying among the people that the solstice in winter is as big as a year. This means that the customs and habits of the winter solstice are almost the same as those of the New Year.

Zhao Zhi Heng said that in Shang Dynasty, Zhou Dynasty and Qin Dynasty, the winter solstice was designated as "the first year of the year"-New Year. The Han Dynasty began to designate it as a festival-Winter Festival. "Book of Rites" said: The king led hundreds of civil and military officials to make sacrifices in the suburbs to welcome the long day. Today, there is a folk proverb that "the solstice in winter spoils the jiaozi bowl, and nobody cares if the ears are frozen".

References:

Sichuan Provincial People's Government-At 7: 03 on the 22nd, the coldest time of the year has arrived, which is the "winter solstice".