Is the Great Cold the same day every year? What is the date of the great cold?

The Great Cold is the last solar term in a year, and its arrival means that the Spring Festival in China is coming soon. So when was the great cold in 2023? Is the Great Cold the same day every year? Many friends want to know the answer to this question. Let's have a quick look.

What is the date of the Great Cold in 2023?

The Great Cold is the day when the longitude of the sun reaches 300 degrees. Great cold in 20231October 20th 65438+ 16:29:20. This day happens to be the 29th day of the twelfth lunar month. The great cold comes at the end of the year, winter goes to spring, and after the great cold, a new cycle begins. In some parts of China, during the Great Cold to beginning of spring, there were many important folk customs, such as taking off old cloth to make bacon, offering sacrifices to stoves and ending sumptuous food. Tail luxury food is also called "making teeth" and "making luxury food", and there is a folk custom of "eating tail teeth" after eating luxury food.

Is the Great Cold the same day every year?

No. There is no fixed date for the Great Cold, which is the last of the 24 solar terms. The longitude of the sun reaches 300 degrees, and it meets on the Gregorian calendar 65438+1October 20th-65438+1October 20th. Therefore, the annual severe cold date is generally 65438+1October 20th or 65438+1October 2nd1in Gregorian calendar. For example, the freezing date of 202 1 this year is 65438+1October 20th, depending on the year.

How many days is the difference between severe cold and slight cold?

15 days. Great cold and slight cold are two adjacent solar terms, and the difference between the two solar terms is 15 days. For example, 202 1, slight cold is 1.5 in the Gregorian calendar, and great cold is 1.20 in the Gregorian calendar. Great cold, like slight cold, is also a solar term indicating the cold weather. Literally, we can see the difference between them, one is "big" and the other is "small". Because the time is around December of the lunar calendar, it is called December Festival, and the two solar terms are equally cold.

Severe cold weather change

During the severe cold solar term, the atmospheric circulation is relatively stable, and the adjustment period of circulation is about 20 days. When this circulation is adjusted, there will often be a wide range of rain and snow weather and strong winds to cool down. When the west of 80 degrees east longitude is a long wave ridge and East Asia is a coastal trough, under the influence of northwest wind and constantly supplemented cold air, China will have a sustained low temperature. Like slight cold, great cold is also a solar term indicating the degree of cold weather. According to the statistics of perennial climate data in China, the coldest period of a year in northern China is in the middle of June 65438+10 (June 65438 +00-20). The annual slight cold solar term starts from 65438+1October 5-7, one solar term is about 15 days, and the middle section is just within the slight cold solar term; So for most parts of the north, slight cold is indeed colder than severe cold. But for most parts of the south, it is the coldest in the great cold solar terms; The severe cold solar term in the south generally starts from 65438+1October 20th, and the end of 65438+1October is the coldest time of the year in the south.