1 The winter solstice is the 22nd solar term among the 24 solar terms in China, when the sun reaches 270. The Transcript of Compliance with the Constitution records: "When the cathode arrives, the yang begins to grow, the sun goes south, the day is short, and the shadow is long, so it is called the winter solstice." On the winter solstice, the sun shines directly on the tropic of Capricorn, with the shortest days and the longest nights in the northern hemisphere. As early as the Spring and Autumn Period more than 2,500 years ago, China had observed the sun with Tugui and determined the winter solstice, which was the earliest of the 24 solar terms, and the time was from the Gregorian calendar1February 2 1 day to the 23rd every year.

2. The winter solstice is the shortest day of the year in all parts of the northern hemisphere, and the days get shorter as you go north. North of the Arctic Circle, the sun is below the horizon all day, making it the widest day of the year in the northern hemisphere. For the rest of the northern hemisphere, the winter solstice is also the lowest day of the year at noon.

3, the winter solstice solar terms are freezing, outdoor activities have been less, and people spend more time at home. The winter solstice has become a festival for visiting relatives and friends. "Fat winter and thin year", in the folk, winter solstice solar terms should also be held to celebrate winter and worship winter activities, such as gathering fires on the winter solstice festival in November of the lunar calendar, worshiping family temples and temples, worshiping parents and elders, and holding family banquets to congratulate relatives. The custom of eating jiaozi on the winter solstice is widely circulated among the people.

4. From the point of view of TCM theory, the winter solstice is when the yin qi flourishes and declines, and when the yang qi begins to sprout, the yin and yang transform, which constitutes the balance and harmony between nature and human body in exercise, and health preservation should also conform to this law. Don't eat too spicy and stimulating food on the winter solstice. Eating too spicy can only lead to the accumulation of internal heat and the stagnation of heat. First of all, we should wear more clothes and avoid cold evil, especially pay attention to the warmth of our feet.