When is the solstice in winter?

The winter solstice is the 22nd of the 24 solar terms. "Twenty-four solar terms" and "December architecture" are the basic contents of the official calendar. The "twenty-four solar terms" were originally determined by the bucket handle rotation direction of the Big Dipper, which rotates circularly and is closely related to the twenty-four solar terms. In different seasons and at different times, the Big Dipper will point in different directions, which has also become the basis for ancient people to judge the changes of solar terms, that is, the so-called "bucket handle refers to the east, and the world is spring; Guide to barrel handle, it's summer in the world; Bucket handle refers to the west, and the world is autumn; Bucket handle refers to the north, and the world is winter. ".

In traditional culture, the branch is linked with the time position of gossip, and the yin position is the "root position" of gossip the day after tomorrow. It is the position at the end of the year and the beginning of the year, representing the end and the beginning, such as Yi Shuo Gua Zhuan: "The root, the divination in the northeast, is also the beginning of everything." Bucket handle starts from the north of due east (yin position, gossip position the day after tomorrow) and rotates clockwise for one week, indicating one year old (figure), and beginning of spring is the beginning of a year. When bucket handle points to the "lower" position due north, it is the solstice winter solstice.