What does the Millennium in the 24 solar terms mean?

Millennium refers to the end of the Qiu Meng season and the beginning of the Mid-Autumn Festival, which is an important festival reflecting the temperature changes in nature. In the Millennium, the autumn wind cools down and dries the moisture in the air. This dry climate feature is called "autumn dryness", and the climate feature of the Millennium is dryness.

When the sun reaches longitude 165 degrees, it is white dew, which is in September 2007-2009 in Gregorian calendar. The ancients used four seasons with five elements, and autumn was golden and golden white, so white was used to describe autumn dew. Even if the Millennium season is really autumn, the Millennium has basically ended the sultry summer. In the Millennium, the sky is high and the clouds are light, the air is cool and cool, the temperature difference between morning and evening is large, and there will be a little coolness at night, which obviously feels cool in autumn.