What is behind the heat of the 24 solar terms?

Behind the heat of the 24 solar terms is the Millennium. Summer is the 14th of the 24 solar terms, and the Millennium is the 15th of the 24 solar terms. When the sun reaches 165 degrees, it is the white dew, which is celebrated on September 7-9 in the Gregorian calendar. The arrival of the Millennium means that the summer heat is over, which is the turning point from sultry to cool in autumn.

The white dew is the fifteenth solar term in the twenty-four solar terms of the lunar calendar, and it is the white dew when the sun reaches 165 degrees. Millennium is the third solar term in autumn, marking the end of Qiu Meng and the beginning of Mid-Autumn Festival.

After the "White Dew" solar term, the influence of cold air in the north is constantly strengthened, and sometimes it will go south, resulting in a gradual decline in temperature and an increasing temperature difference between day and night. This warm day and cool night environment is very conducive to the formation of "white dew", but also conducive to the transport and accumulation of nutrients in crops, and promote the rapid maturity of crops, which is a favorable condition for high yield.