Which four solar terms do the "four miles" in the twenty-four solar terms refer to?

Among the 24 solar terms, "Sili" refers to beginning of spring, Changxia, beginning of autumn and beginning of winter.

Beginning of spring is the first of the 24 solar terms. Standing means "start"; Spring represents warmth and growth. Twenty-four solar terms were originally formulated on the basis of "variable stars". When the bucket handle of the Big Dipper points to the shade, it is beginning of spring. At present, solar terms are determined according to the longitude of the sun. When the sun reaches longitude 3 15, it will be the beginning of spring, and the festival will be held from February 3 to 5 of the Gregorian calendar every year. In the era of cadres and branches, silver moon is spring, beginning of spring is the beginning of a year, and beginning of spring is the beginning of everything, which means all self-renewal, which means the beginning of a new cycle. In the traditional concept, beginning of spring has auspicious meaning.

Long summer is the seventh of the 24 solar terms and the first in summer. The delivery date is May 05-07 in the Gregorian calendar every year. At this time, the bucket handle of the Big Dipper points to the southeast, and the longitude of the sun reaches 45. Almanac: "Dou refers to the southeast, Wei is the long summer, and everything has grown up since then, so it is named long summer." After the long summer, the sunshine increased, gradually warming, and thunderstorms increased. Long summer is an important solar term, marking the peak season for the growth of all things. In the long summer, everything is thriving.

Beginning of autumn is the thirteenth of the twenty-four solar terms, and it is the beginning of autumn. The bucket refers to the southwest, and the sun reaches the longitude of 135, and it is celebrated on August 7 or 8 of the Gregorian calendar every year. "Reason" means the beginning; "Autumn" means that the grain is ripe. The change of the whole nature is a step-by-step process, and beginning of autumn is a turning point in which the Yang gradually closes, the Yin gradually grows, and the Yang gradually gets cloudy. In nature, everything begins to mature from luxuriance.

Beginning of winter is the 19th of the 24 solar terms and the beginning of winter. Bucket handle points to the northwest, and the longitude of the sun reaches 225, which intersects with Gregorian calendar165438+1October 7-8 every year. Stand still, build the beginning; In winter, everything will be collected in the end. Beginning of winter means that anger begins to close and everything enters a state of recuperation. Its climate has also changed from dry autumn to rainy and cold winter.