What is the exact date of the Great Cold in 2023?

What is the date of the Great Cold in 2023?

The solar terms of the severe cold in 2023 are Gregorian calendar1October 20th, 65438+ 16:29:20, and the 29th day of the twelfth lunar month, Friday. The formula for calculating the severe cold time is [y * d+c]-L, where y is the last two digits of the number of years, d is D=0.2422, l is the number of leap years, 2 1 century c is 20.12, and C=20.84th century c is 20.84. For example, the date of severe cold in 2089 = [89× 0.2422+20.12]-[(89-1)/4] = 41-22 =19,65438+/.

The origin of the great cold

The Great Cold is the last of the 24 solar terms, and it is called "Great Cold" when the sun reaches 300 degrees around 65438+1October 20th every year. Great cold refers to extremely cold weather. "Give time to pass the exam, weather" quotes "Three Rites and Righteousness": "Great cold is the middle, shaped by slight cold, so it is called the inverse pole of great cold, so it is called great cold." At this time, the cold wave southward is very frequent, which is the cold period in most parts of our country in a year. Moreover, during this period, the wind is strong, the temperature is low, and the snow on the ground does not melt, showing the cold phenomenon of ice and snow and freezing in the cold.

In ancient China, the Great Cold was divided into three stages: "One stage is chicken milk; Second, the symptoms of bird disease; Three times, the water is strong. " In other words, chickens can hatch in the great cold solar terms; At this time, eagles and other falcons are in a state of strong predation ability, hovering in the air for food, supplementing their body energy to resist the cold; In the last five days of the year, the ice in the water has frozen to the center of the water, and it is the strongest and thickest. 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 the northwest wind and the continuously supplemented cold air, China will have a sustained low temperature.

Seasonal characteristics of severe cold

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. Modern meteorological observation records show that in some areas of China, severe cold is not as good as slight cold, but in some years and a few coastal areas, the annual minimum temperature will still appear within the severe cold solar terms. Therefore, it is necessary to continue to do a good job in the cold protection of crops, especially to protect livestock from wintering.

In the severe cold season, the average temperature in most parts of southern China is 6℃ to 8℃, which is nearly 65438 0℃ higher than slight cold. The proverb "slight cold and cold, cold into a ball" shows that the great cold solar terms are also the cold period of the year. Slight cold and severe cold are the periods with the least rainfall in a year.

Great cold custom:

1, Food with a Rich Tail: According to the custom in China, especially in rural areas, people are busy going to the old cloth and the new ones to pickle new year's vegetables and prepare new year's goods every cold festival. During the period from the Great Cold to beginning of spring, there were many important folk customs and festivals. For example, sumptuous food, kitchen sacrifices and New Year's Eve, and sometimes even the Spring Festival, the biggest festival in China, are all in this solar term. The cold solar term is full of joy and festive atmosphere, and it is a cheerful and relaxed solar term. Tail teeth originated from the custom of worshipping the earth god as "teeth"

2. Drink chicken soup: In the cold winter, Nanjing people have more stews and soups in their daily diet. The severe cold has reached the ninth month of the lunar calendar, and the traditional eating custom of "one chicken" is still respected by many citizens' families. Nanjing people choose old hens, or stew them alone, or add ginseng, medlar, black fungus and so on. Drinking chicken soup in cold winter is really a pleasure.

3. Eat glutinous rice: In the vast areas of southern China, there is a custom of eating glutinous rice in cold weather. Although this custom sounds simple, it contains the life experience accumulated by predecessors. Because the cold weather is particularly cold, glutinous rice is a kind of food with high calorie and has a good cold-proof effect. There are many ways to make glutinous rice, which has the effect of tonifying the middle energizer and benefiting qi, so it is most suitable to eat glutinous rice in cold season.

4, offering sacrifices to the kitchen god to pray for the blessing of the gods: offering sacrifices to the kitchen in the off-year is the same custom in the north and south. In the past, on this day, people would worship the statues of the kitchen god and his grandmother on the wall near the kitchen stove.