The origin of summer solar terms

In summer, it means "going out of summer" and leaving in the heat.

Summer is the14th solar term among the 24 solar terms of the lunar calendar, and the node time is around August 23rd of the Gregorian calendar, when the sun reaches 150.

Summer solar terms mean entering the autumn with meteorological significance. After the summer, the temperature in the area north of the Yangtze River in China gradually drops.

At this time, the sun runs near the fourteen stars of Leo Xuanyuan. Looking at the Big Dipper at night, the curved bucket handle still points to "Shen" (southwest).

When the sun reaches longitude 150, it is the heat of the 24 solar terms of the lunar calendar. Summer is a solar term reflecting the temperature change. "Chu" means to hide and die, and "early summer" means that the hot summer has passed. "Twenty-four solar terms" said: "Go, go, the heat is over." "Chu" means termination, which means that the summer heat is about to pass, the summer heat will end on this day, and the temperature in most parts of China will gradually drop. Being in summer is not only different from mild summer, severe summer, slight cold and severe cold, but also represents the transition from hot to cold.

China divided the summer heat into three periods: "The eagle is a sacrificial bird; Second, wait for the beginning of heaven and earth; Three Hou Wonaideng. " In this solar term, eagles began to prey on birds in large numbers; Everything between heaven and earth began to wither; "Henaideng" refers to millet, millet, rice and sorghum crops, and "Deng" means maturity.