One of the twenty-four solar terms, "Mangzhong", is in the month of the solar calendar.

The awn seed is the ninth solar term in the twenty-four solar terms, and it is also the beginning of the noon month of the dry calendar; The time point is around June 6 of the Gregorian calendar every year, and the sun reaches 75 degrees of the yellow meridian. The word "awn seed" literally means "wheat with awn is harvested quickly, and rice with awn can be planted". In ancient China, mango seeds were divided into three stages: "One stage was when mantis was born; Second, wait for Peng to start singing; The third-class tongue is silent. " At this time, the middle and lower reaches of the Yangtze River in China will enter the rainy Huangmei season.