The best time of day for surgery is between 8 and 9 a.m., when patients do not have to wait too long and when doctors are more energetic. From the patient’s point of view, surgery between 8 and 9 a.m., fasting time will not be too long, there will be no obvious hunger, waiting for too long, may lead to mental anxiety, nervousness, hormone level fluctuations, and even produce insulin resistance, blood glucose to produce greater fluctuations. From the doctor’s point of view, 8 to 9 o’clock more energetic, will not produce fatigue, sleepiness and other feelings. However, the specific optimal time for surgery should also be decided according to the specific condition, if the situation is urgent, the earlier the better, it is recommended that the patient and the doctor to communicate and negotiate the optimal time for surgery.