The winter solstice is the shortest day and the longest night in the northern hemisphere all year round. After the winter solstice, the days will get longer and the nights will get shorter. The ancients said about the winter solstice: 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 "winter solstice". After the winter solstice, the climate in all places has entered a coldest stage, which is often called "entering the ninth year". There is a saying in China that "the cold is in the third year and the heat is in the dog days". Before the winter solstice, there is heavy snow, and after the winter solstice, there is slight cold. The winter solstice is from December 21st to December 23rd. According to modern astronomical science, the sun shines directly on the tropic of Capricorn (also known as the winter solstice line) on the winter solstice, and the sun is most inclined to the northern hemisphere, with the shortest winter solstice and the longest night in the northern hemisphere. After the winter solstice, the sun slowly shifted to the Tropic of Cancer, and Taiwan Province also approached spring from winter, and the days in the northern hemisphere gradually lengthened, while the nights gradually shortened. Therefore, there was a saying in ancient times that "the winter solstice is a sun-set", which means that the sun's spirit gradually picked up from the winter solstice. In ancient China, great attention was paid to the winter solstice, which lasted for ten days in the solar calendar year (New Year's Day). The winter solstice is regarded as a big festival. There was a saying that the winter solstice was as big as a year, and there was a custom to celebrate it. "Han Shu" said: "The sun is shining on the winter solstice, and the monarch is long, so congratulations." People think that after the winter solstice, the days are getting longer and the sun's spirit is rising, which is the beginning of a solar cycle and an auspicious day and should be celebrated. It is recorded in the Book of Jin that "Wei, Jin and Winter Solstice were called He Qiyi inferior to Zhengdan by all countries and hundreds of people." Explain the importance attached to the winter solstice in ancient times. In China's traditional theory of Yin-Yang and Five Elements, the winter solstice is the key solar term in the transformation of Yin-Yang. In the twelfth year, the divination is a mine complex divination, which is called the winter solstice. Yi yue: the first king and even the Japanese closed their doors, so business travel was no good. The ancients thought that by the winter solstice, although it was still in the cold season, spring was not far away. At this time, people who go out will go home for the winter festival, indicating that they will have a home at the end of the year. People in Fujian and Taiwan believe that the annual winter solstice is a festival for family reunion, because it is a day to worship ancestors. If you go out and don't go home, you are a person who denies your ancestors. In addition, people have predicted the weather in the future based on the weather quality and arrival sequence of the winter solstice. As the saying goes: "the winter solstice is at the beginning of the month, and it should be cold at the end of the year;" The winter solstice is at the end of the month, and it should be cold in the first month; The winter solstice is in the middle of the month, and there is no snow or frost "(this is based on the arrival of the winter solstice, and it is speculated that the cold current will arrive in Taiwan Province sooner or later); As the saying goes: "The winter solstice is black, and the New Year is sparse; The winter solstice is sparse, and the New Year is dark "(meaning: if there is no sun on the winter solstice, it will be sunny in the New Year, on the contrary, if the winter solstice is sunny, it will rain in the New Year). There are different customs in different places during the winter solstice. In the north, there are customs of slaughtering sheep, eating jiaozi and eating wonton. In the south, there are customs of eating rice balls and long noodles during the winter solstice, while people in southern Jiangsu eat green onions and fried tofu during the winter solstice. There is also the custom of offering sacrifices to heaven and ancestors on the winter solstice in various regions. The winter solstice, also known as the winter festival, according to the traditional Chinese calendar, takes five days as a waiting period, three days as a section or a breath, and it is divided into twelve sections and twelve gases in a year, which are collectively called twenty-four solar terms. This is the solar term used in the study of day selection, which is based on the solar terms of the lunar calendar, while the so-called lunar calendar is a combination of the solar calendar and the lunar calendar, which refers to the twenty-four solar terms (the solar cycle is divided into twelve stages, In ancient China, the winter solstice was divided into three phases: "One phase of earthworm knot; Two-phase angular solution; It is said that the earthworm is a creature whose yin bends and the yang stretches. At this time, although the yang has grown, the yin is still very strong, and the earthworm in the soil is still curled up. Mi and deer belong to the same family, but the yin and yang are different. The ancients thought that Mi's horns were facing the afterlife, so it was yin, while the winter solstice was a yang, and Mi felt that Yin gradually retreated and solved the angle. Because the yang is born, the spring water in the mountain can flow and be warm at this time. Because the winter solstice is not fixed on a specific day, it is called "live festival" like Qingming. What does the winter solstice mean? The winter solstice means that the cold winter is coming. At the winter solstice, the solar longitude is 270. On the winter solstice, the sun shines almost directly on the Tropic of Capricorn, and our northern hemisphere has the shortest day and the longest night, and it has begun to enter several cold days. Astronomy stipulates that this day is the beginning of winter in the northern hemisphere. After the winter solstice, the direct sunlight gradually moved northward, and the days in the northern hemisphere gradually became longer. As the proverb goes, eating noodles on the winter solstice makes a day grow longer. The diet of the winter solstice The ancients thought that by the winter solstice, although it was still in the cold season, spring was not far away. At this time, people who go out will go home for the winter festival, indicating that they will have a home at the end of the year. In northern China, there is a custom of eating jiaozi on the winter solstice. As the saying goes: "When the winter solstice comes, eat dumplings." In the south, dumplings are eaten, but there are exceptions. For example, in the surrounding areas of Tengzhou, Qufu, Zoucheng and Linyi, Shandong Province, the winter solstice custom is called Jiujiu, and the custom of drinking mutton soup on the same day is popular, which means driving away the cold. Eating customs vary from place to place, but eating dumplings is the most common. The winter solstice is usually on December 22nd or 23rd of the Gregorian calendar. In ancient China, great attention was paid to the winter solstice, which was regarded as a big festival. There was a saying that the winter solstice was as big as a year, and there was a custom to celebrate it. "Han Shu" said: "The sun is shining on the winter solstice, and the monarch is long, so congratulations." People think that after the winter solstice, the days are getting longer and the sun's spirit is rising, which is the beginning of a solar cycle and an auspicious day and should be celebrated. It is recorded in the Book of Jin that "Wei, Jin and Winter Solstice were called He Qiyi inferior to Zhengdan by all countries and hundreds of people." Explain the importance attached to the winter solstice in ancient times. In China's traditional theory of Yin-Yang and Five Elements, the winter solstice is the key solar term in the transformation of Yin-Yang. In the twelfth year, the divination is a mine complex divination, which is called the winter solstice. Yi yue: the first king and even the Japanese closed their doors, so business travel was no good. There are different customs in different places during the winter solstice. For example, northerners eat jiaozi during the winter solstice, while people in southern Jiangsu eat fried tofu with green onions during the winter solstice.