Which solar term does Sanjiutian start from?

Which solar term did Sanjiutian start from? How is 39 days calculated?

"Winter solstice" refers to three cold days, between slight cold and severe cold. The specific calculation method is that from the winter solstice, every "nine" is counted as a "nine", the first nine days are called "one nine", the last nine days are called "two nine", and so on, and the coldest period of the year is "three nine".

The calculation of "three or nine days" is an experience summed up by the ancients on the basis of generations of production and life practice, using some ecological reflections and weather signs in nature. It is quite scientific and still plays a guiding role in the arrangement of people's production and life, so it has been popular and widely circulated in people's words and behaviors. With the development of history, people all over the country have compiled various proverbs, ballads and jingles according to different climatic conditions, landscape characteristics, agricultural phenology and customs. There are several nine songs all over the country, but the lyrics are slightly different.

The widely circulated "99-year-old Quhan Song" said:

"1929 don't make a move,

Walking on the ice in 3949,

59 and 69, looking at the willows by the river,

The river froze in' 79, and swallows flew in' 89.

99 plus 19, plowing cattle everywhere. "

How to keep warm in three or nine days

Drink more soy milk.

Compared with carbohydrate or fat intake, protein intake can significantly increase body temperature. It is recommended to drink a cup of soybean milk for breakfast, and at the same time, you can eat some nuts and yogurt properly.

Add clothes

If you want to be beautiful, you have to freeze. However, this practice is extremely harmful to human health. After the winter solstice solar term, people should add clothes in time according to the weather conditions. Clothes and trousers should be warm, soft and loose, and should not be worn too tightly to facilitate blood flow.

Use moisturizing cream

Patients with eczema or dermatitis should pay more attention to moisturizing in cold weather. Because inflammation in the dermatitis site will accelerate the blood flow in the epidermis, leading to more body heat loss.

The hat should cover your ears.

Head heat dissipation accounts for 30% of body heat dissipation. It is best to choose a hat that can cover your ears, because although your ears are thin, they have a large surface area and are easier to dissipate heat.

by oneself

As the saying goes: "Exercise more in winter and get sick less; Lazy in winter, drink a bowl of medicine. "So, at this time, it is necessary to carry out appropriate winter sports and physical exercise. For example, washing your face with cold water, jogging, boxing, sword dancing, etc. can all improve your body's adaptability to cold and cold tolerance.

Eat some warm food.

In daily diet, people should eat more cold-proof foods, such as kelp, laver, spinach, Chinese cabbage, corn, lotus root, carrot, sweet potato, lily, mutton and beef. These foods can improve the body's cold-proof ability, keep warm and prevent winter diseases.