What do the solstice in winter and the solstice in summer mean? Come on! ! ! urgent ...

The winter solstice, also known as the Winter Festival, according to the traditional calendar of China, takes five days as the waiting period, three days as a section or breath, and a year is divided into twelve sections and twelve qi, which are collectively called twenty-four solar terms. This is the solar term used to study the date selection, which is based on the solar term of the lunar calendar, and the so-called lunar calendar is a combination of the solar calendar and the lunar calendar, which refers to the 24 solar terms (the solar cycle is divided into twelve stages, and the lunar calendar is a pure month (according to the moon cycle). ), the date is1February 22nd or 23rd in the national calendar. Winter solstice is one of the 24 solar terms. Because the winter solstice is not fixed on a certain day, it is called a "living festival" like Qingming.

On June 2 1 or 22 every year, the sun reaches 90 degrees of the yellow meridian, which is the "summer solstice" solar term. According to "Zunxian Manuscript", "The sun arrives in the north, the days are long and the shadows are short, so it is called the summer solstice. At best, it is excellent. " From summer to the sun, the sun directly reaches the northernmost point of the year, almost directly to the Tropic of Cancer (23 27' north latitude), and the daytime in the northern hemisphere is the longest, and the farther north it is, the longer it is. For example, the daily length of Haikou in Hainan is a little more than 13 hours, Hangzhou is 14 hours, Beijing is about 15 hours, and Mohe in Heilongjiang can reach 17 hours. From summer to the future, the position of direct sunlight on the ground gradually moves southward, and the days in the northern hemisphere become shorter day by day. There is a folk proverb that "eating noodles on the solstice in summer will shorten the day". The southern hemisphere is in the middle of winter.