Staying up late refers to irregular sleep, such as not sleeping when it’s bedtime, resulting in a lack of sleep to make the body and mind feel tired. 12 o’clock to sleep and 7 o’clock to get up, whether it is considered staying up late, need to be analyzed according to the patient’s age group. If the patient is a minor, it is usually considered staying up late; if the patient is an adult, it can not be considered staying up late.1. Minors: Usually, teenagers need to ensure 8-10 hours of sleep, while school-age children, preschoolers and infants need a longer sleep time, so going to bed at 12:00 p.m. and getting up at 7:00 p.m. cannot meet the sleep demand and is considered staying up late. In daily life, it is best for minors to ensure adequate sleep every night in order to develop normally and have plenty of energy; 2. Adults: If the patient is over 18 years old, going to bed at 12:00 and getting up at 7:00 is usually not considered staying up late. Adults generally need to ensure that 7-8 hours of sleep, while the elderly sleep shorter, usually in 6-8 hours, such work and rest time for sleep time is sufficient, and therefore not considered to stay up late. To sum up, whether sleeping at 12:00 and getting up at 7:00 is considered staying up late, we need to analyze according to the specific situation. For adults, even if 12 o’clock sleep is not considered to stay up late, but also considered to sleep late, generally people will enter a state of deep sleep from 11:00 pm to about 2:00 am, in order to fully relieve fatigue, to ensure that their own tissue, cell repair. Therefore, it is recommended to develop a good sleep time, more conducive to the health of the body and plant nerve function.