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After the solstice in winter, the days get longer and longer. In ancient times, people thought that the sun was the first to move, so the winter solstice was also called the sun. Winter solstice, also known as solstice, winter festival, child year, etc. It has both natural and humanistic connotations. It is not only an important solar term among the 24 solar terms, but also a traditional folk ancestor worship festival 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.
The winter solstice is the 22nd solar term among the 24 solar terms, with a solar calendar of 270 degrees. It is celebrated every year on the Gregorian calendar of 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 a turning point for the direct point of the sun to return to the north. After this day, it will go back.
Historical origin
China's astrological culture has a long history and is profound. At first, the 24 solar terms were based on the movement of stars. In different seasons and at different times, the Big Dipper will point in different directions, that is, bucket handle points east, the world is spring, bucket handle guides it, the world is summer, bucket handle points west, the world is autumn, the handle points north and the world is winter. Twenty-four solar terms are the product of ancient farming civilization, which is related to the time of gossip and has a long history.
During the period of Emperor Wu of the Western Han Dynasty, the twenty-four solar terms were absorbed into the taichu calendar Law as a supplement to the calendar to guide the agriculture in the northern part of the Central Plains, and the twenty-four solar terms were measured in the Yellow River basin by the method of soil returning to the sun and shadow measurement. The current 24 solar terms are determined according to the position of the sun on the ecliptic, that is, on a 360-degree circle of the ecliptic, the spring is divided into 0 degrees, and every time the sun runs on the ecliptic, 15 degrees is a solar term. In the process of inheritance and development, the 24 solar terms have been incorporated into the lunar calendar and become an important part of the lunar calendar.
Baidu encyclopedia-winter solstice