仲夏五月俗称恶月、毒月。周代《礼记》等均谓：四月芒种后，至五月，阳气（白昼）长至极而始亏（短），阴气（黑夜）逆阳，冒地冲出至萌成而始长。此月，万物感阳气而长者则生，感阴气而成者则死，乃阴阳会通而相会，死生交替而分判之月。同时，暖气始盛，虫蠹并兴，毒虫滋生 Midsummer May is commonly known as the Evil Moon and Poison Moon. “Book of Rites” and so on in the Zhou Dynasty all mean that after the April species are mowed to May, the yang (day) grows extremely deficient (short) and chills (darkness) long. This month, all the sense of yang and the elderly are born, the sense of yin and then die, but the yin and yang will pass and meet, dead alternately turn the sub-sub-month. At the same time, heating began to Sheng, worms and Xing, poisonous worms breed