What are the three periods of high temperature in summer?

The three periods of intense heat are: first, the eagle sacrifices birds; second, the heavens and the earth begin to sink; third, the grains ascend to heaven. The eagle is a kind of sacrificial bird, which means that after summer, the eagle begins to hunt a large number of birds and will slowly enjoy the captured prey on the ground, just like displaying sacrifices. Hunting at this time is also to "paste autumn fat" and prepare for autumn and winter. The beginning of heaven and earth meant that everything began to wither, and the ancients often executed prisoners at this time in order to follow the spirit of heaven and earth. Henaideng means that crops such as millet, millet, rice and sorghum begin to mature and enter the harvest season.

Being in summer is the fourteenth of the twenty-four solar terms. Dou Zhiwu (Southwest); The solar meridian reaches150; August 22-24 of the Gregorian calendar every year. Being in the heat is "out of the heat", that is, out of the heat. In summer, the direct point of the sun continues to move southward, the solar radiation weakens, the subtropical high also withdraws southward, the temperature gradually drops, and the summer heat gradually disappears.

The arrival of summer means that the hot and difficult weather is over. During this period, the weather is still hot, but it has shown a downward trend. Summer solar terms are in the period of short-term high-temperature weather (autumn tiger), which generally occurs between August and September in the Gregorian calendar. The duration of autumn tigers generally ranges from half a month to two months.

The significance of summer heat in daily life is to remind people that the summer heat is gradually disappearing and the weather is turning from hot to cold, so we should pay attention to preventing "autumn dryness". There are many folk activities in summer, such as eating ducks, setting off river lanterns, opening fishing festivals, decocting medicinal tea and offering sacrifices to the land.