1 and midnight refer to 23 o'clock to 1 o'clock. Midnight is also called midnight, midnight, midnight, midnight, midnight, night, night and so on. Midnight is the first hour of twelve o'clock. Twelve o'clock in China is headed by Zishi, from 23: 00 to 1: 00 in the evening. One day before zero, one day after zero. Rats are most active at this time.

2. Kong Ying Da is explaining the sentence "Seven years in the Spring and Autumn Period, no stars in summer and April": "Nocturnal people are the floorboard from fainting to death." The period from darkness to light is called night. "Midnight" refers to the middle period from darkness to dawn, which is a natural phenomenon, and what people usually call "midnight" generally refers to all the dark time, which often exceeds two hours of midnight.

3. Twelve-hour system. It was used in the Western Zhou Dynasty. The Han Dynasty named it Midnight, Crow, Pingdan, Sunrise, Food Time, Corner, Japan, China, Sun, Sun, Dusk and Man. It is also expressed by the twelve earthly branches, and it is the child time from 23: 00 to 1 at midnight, the ugly time from 1 to 3: 00, and the Yin Shi time from 3: 00 to 5: 00, which are recursive in turn.