Winter solstice is a brief introduction to winter solstice.

1. The winter solstice begins at 270 degrees of the yellow meridian, 65438+ February 22nd of Gregorian calendar or 1 month15th of lunar calendar * * * within 30 days.

2. The winter solstice with both natural and humanistic connotations is not only an important solar term among the 24 solar terms, but also a traditional folk festival of ancestor worship in China. The solstice in winter is one of the eight festivals in four seasons, and it is considered as a big holiday in winter. In ancient times, there was a saying that the winter solstice was as big as a year. The custom of winter solstice varies in content or details due to different regions. In southern China, there are customs of offering sacrifices to ancestors and enjoying the winter solstice. In northern China, it is a custom to eat jiaozi from winter to Sunday every year.

3. The winter solstice is the 22nd solar term in the "twenty-four solar terms", and the solar calendar reaches 270, which is celebrated every year in Gregorian calendar 65438+February 2 1-23. The solstice in winter is the extreme point of direct sunlight spreading to the south. On the solstice in winter, the sun shines directly on the Tropic of Capricorn, which is the most inclined to the northern hemisphere and the solar altitude angle is the smallest. In all parts of the northern hemisphere, the days are the shortest and the nights are the longest. The solstice in winter is also the turning point of direct sunlight returning to the north. After this day, it went back, and the direct sunlight began to move northward from the Tropic of Capricorn (23 26' s), and the sunlight in the northern hemisphere (China is located in the northern hemisphere) increased day by day.

On the day of winter solstice, although the sun is low and the days are short, the temperature from winter solstice is not the lowest in meteorology. In fact, because there is still "accumulated heat" on the surface, it is usually not very cold before the winter solstice, and the real cold is after the winter solstice. Because of the huge climate difference in China, this climatic winter is obviously late for most parts of China. The winter solstice marks the beginning of the cold season, and people begin to count to nine to calculate the cold weather (folk proverb: "The summer solstice is three Geng, and the winter solstice is nine").