There's a saying in China, long summer says summer.

There's a saying in China: Look at the summer in the long summer.

Long summer is the seventh solar term among the twenty-four solar terms and the first solar term in summer. The festival is held on May 5-7 of 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: "The bucket refers to the southeast dimension and the long summer. Everything has grown up since then, so it is named Long Summer. " In the long summer, everything is thriving. 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.

Establishment means establishment and beginning. "Xia" means "big" in the old saying. Everything grew up and was named Changxia. Because China has a vast territory and a large span from north to south, natural rhythms vary from place to place.

In the long summer season, only the area south of Fuzhou-Nanling line in China presents the midsummer scene of "the trees grow dark in summer and the balcony reflects into the pond"; And parts of the northeast and northwest just have the breath of spring at this time.

On the day of long summer, many places have the custom of eating "long summer rice", eating eggs, weighing people and tasting three delicacies. Entering the long summer, people's metabolism is accelerated, and blood supply to the heart and brain is insufficient, which often makes people fidgety, tired and lazy. It is necessary to arrange work and rest time reasonably, supplement nutrition and adopt correct health care methods.

The twenty-four solar terms were originally formulated according to the changes of stars. The Big Dipper rotates circularly, and bucket handle rotates clockwise once, which is called one of the "years old". At present, the establishment of the twenty-four solar terms is based on the "annual apparent movement of the sun", which is also the degree of the yellow meridian of the sun. Although they are established in different ways, the cause of the struggle is that the earth revolves around the sun, so the time of their intersection is basically the same.

Twenty-four solar terms are special festivals in the dry calendar that express the change of natural rhythm and establish the "December Construction" (festival). Dou refers to the long summer in the southeast, and everything has grown up since then, hence the name long summer. At present, solar terms are determined according to the position of the sun on the ecliptic. When the sun reaches 45 degrees of the ecliptic, it is the solar term of long summer.