Beginning of autumn is the 13 solar term among the 24 solar terms, which falls between August 7 and 9 every year. It is the first solar term in autumn, marking the official start of the autumn season. Beginning of autumn generally indicates that the hot summer is coming and autumn is coming. After beginning of autumn (solar term), the next rain will cool down after autumn, so there is a saying that "one autumn rain is cold, and ten autumn rains will wear cotton". Beginning of autumn is one of the "Four Seasons and Eight Festivals" in ancient times, and people have the custom of offering sacrifices to the land gods and celebrating the harvest.