What does it mean that farmers don't work hard on sunny days in early autumn?

"It's autumn when it thunders, and Chu Qing in the middle of winter and autumn when farmers don't contribute" means that if it thunders in early autumn and crops fail in winter, and if the weather is favorable in Chu Qing in autumn, farmers will not worry about droughts and floods, and there will be a good harvest next year.

These two sentences are proverbs, beginning of autumn, the first 13 of the 24 solar terms, which falls on August 7 -9 of the Gregorian calendar every year. At this time, the bucket handle of the Big Dipper points southwest, and the sun reaches longitude 135. Beginning of autumn is the first solar term and the starting point of autumn. Autumn begins in the beginning of autumn and ends in beginning of winter, which is the result of celestial movement.