The summer solstice is the 10th solar term of the twenty-four solar terms. It arrives on June 22 in every year. During the summer solstice, there is a lotus viewing festival in ancient China, which began in the Song Dynasty and was commonly known as the birthday of the lotus in the Ming Dynasty. Boating on a lotus lake, cooling off the heat, picking lotus flowers for home viewing, these were what ancient Chinese people do on the summer solstice.