What is big summer? When does big summer usually happen?

The summer heat is the twelfth solar term in the twenty-four solar terms of the lunar calendar. The sun reaches 120 around July 23rd every year. "Dou refers to C as a big summer heat, and the weather in Sri Lanka is better than a small summer heat, so it is called a big summer heat." At this time, it is the hottest period of the year in most parts of China.

This is the hottest solar term in the year around midsummer. In many areas of our country, the high temperature of 40 degrees Celsius often occurs. In this extremely hot season, heatstroke prevention and cooling can not be ignored.

There are three periods of great summer heat: "when rotten grass is firefly, when the soil is hot and humid, and when it rains heavily." Terrestrial fireflies lay eggs on hay, and at high temperature, fireflies ovulate, so the ancients thought fireflies were made of rotten grass; The second weather is that the weather becomes sultry and the land is wet. The third kind of weather is frequent thunderstorm, which weakens the heat and humidity, and the weather begins to transition to beginning of autumn.