Which solar term is beginning of autumn in 24 solar terms?

Beginning of autumn is the thirteenth of the twenty-four solar terms and the first solar term in autumn. The bucket refers to the southwest, and the sun reaches the longitude of 135, and it is celebrated on August 7 or 8 of the Gregorian calendar every year. The change of the whole nature is a step-by-step process, and beginning of autumn is a turning point in which the Yang gradually closes, the Yin gradually grows, and the Yang gradually gets cloudy. In nature, everything begins to move from lush to bleak and mature.

After entering autumn, the climate changed from rainy and humid in summer to dry and rainy in autumn. In nature, the qi of Yin and Yang began to change, and everything gradually declined with the sinking of Yang.

The most obvious change in autumn is that the leaves of vegetation change from lush green to yellow, and the leaves begin to fall and the crops begin to mature. Beginning of autumn is one of the "four seasons and eight festivals" in ancient times. People have the custom of offering sacrifices to the land gods and celebrating the harvest. There are also customs such as "pasting autumn fat" and "biting autumn".