What is the origin and custom of the great cold solar terms?

The origin and customs of the great cold solar term are as follows: It is recorded in "Giving Time and Examining Time" that this solar term is the coldest period of the year from March 9 to April 9 when cold waves frequently go south. There is a folk saying that "a slight cold is the most important thing, and it is cold without wind." Great cold refers to extremely cold weather.

The customs are: welcome the new year in a cold place, cook glutinous rice, eat rich food and eat laba porridge. Laba Festival is an important popular festival in northern China. The custom of this festival is to eat Laba porridge. Laba porridge, also known as "seven treasures and five flavors porridge", "Buddha porridge" and "everyone's meal", is a kind of porridge made of various ingredients.

Climate 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 flow control 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 65438+ 10 in mid-June (June 1 1-20). The annual slight cold solar term starts from 65438+1October 5-7, and one solar term is about 15 days, and the middle section is just within the slight cold solar term.

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