The origin and custom of the light summer season in the twenty-four solar terms

1, July 7th every year, the summer solstice of the lunar calendar. "Dou Zhixin is a mild summer heat, and the weather is already hot, so it has not yet reached the silt pole, hence the name". The longitude of the sun is 105 degrees. It's already very hot, but it's not the hottest time yet, so it's called Xiaoshu.

2. On July 7th or 8th every year, depending on the longitude of the sun's arrival 105, it is a slight summer heat. Twenty-four solar terms: June Festival? Summer, summer, size, small at the beginning of the month, big in the month, and still small today. "The summer heat is hot. The ancients thought that the summer heat period was not the hottest time of the year, so it was called summer heat. There is also a solar term ballad: "Little summer is not hot, but big summer lasts for three days. "It is pointed out that the hottest period of the year has arrived, but it has not yet reached an extremely hot level. As the saying goes, "the heat is at three volts." The dog days in China generally appear on the 28th day after summer, which is the so-called "summer is the first night". "

3. In ancient China, the summer heat was divided into three periods: "First, it was warm and windy; Second, wait for crickets to live in space; The third waiting eagle began to crow. " In summer, there is no cool wind on the earth, and all the winds carry heat waves; The words describing crickets in the Book of Songs in July are "Wild July, August, September at home, October in bed." August mentioned in this paper is June in the summer calendar, which is a short time in summer. Because of the heat, crickets leave the field and go to the corner of the yard to escape the heat. In this solar term, the eagle is in the cool high air movement, because the ground temperature is too high.