1, meaning of the winter solstice: On this day of the winter solstice, the sun moves to the longitude 270 (the winter solstice point), and the position where the sun directly hits the ground reaches the southernmost point of the year. The sun almost directly hits the Tropic of Capricorn (also known as the winter solstice line), and the sun is most inclined to the northern hemisphere. Therefore, the winter solstice is the shortest day and the longest night in the northern hemisphere, and the shorter the day, the longer the night. The winter solstice is the southernmost day of the sun in a year and the extreme of the sun's southbound journey.

2. Climatic characteristics: Astronomy regards the winter solstice as the beginning of the cold winter climate, which is obviously late for most areas in China. The winter solstice is the shortest day of the year in the northern hemisphere. After the winter solstice, the direct point of the sun gradually moved northward, and the daytime in the northern hemisphere began to lengthen gradually, and the height of the sun gradually increased at noon.

Therefore, there is a saying, "Eating noodles on the winter solstice makes a day grow longer." After the winter solstice, although the solar altitude angle gradually increased, it was a slow recovery process, and the heat lost every day was still greater than the heat received, showing a situation of "making ends meet". In the "three or nine days", the accumulated heat is the least, the temperature is the lowest, and the weather is getting colder and colder. At this time, if there is the influence of cold air, the weather is even colder. After this "cold front", the weather will gradually get warmer.

3. Local customs: Dumplings are widely eaten in the north, such as Chaoshan Tangyuan, Southeast Mazi, Taizhou Leiyuan, Hefei Pumpkin Cake, Ningbo Sweet Potato Tangguo, Tengzhou Mutton Soup, Jiangnan Rice, Suzhou Brewing and so on.

4. It should be noted that the winter solstice is one of the most important solar terms in health preservation, mainly because "the winter solstice is a sunny life". Winter solstice to slight cold and severe cold is the coldest season. People suffering from heart disease and hypertension often get worse, and the number of people suffering from "stroke" increases, and it is easy to get frostbite in cold weather. Pay attention to cold and warmth, adjust your diet and daily life reasonably, do not drink, smoke or overwork.

Keep a good mood, be stable and happy, and avoid anger, impatience and depression. Take proper exercise to keep out the cold and take proper tonic.