In ancient times, one day and night were divided into twelve hours, which were represented by 12 earthly branches, and each hour was equal to two hours now. Comparison between ancient and modern times: from 11: 00 p.m. to 1: 00 a.m. the next day, from 1: 00 to 3: 00 in ugly times, from 3: 00 to 5: 00 in Yin Shi, and so on. Every two hours, it is Shi Mao, Chen Shi, Shi Si, Noon, Weishi, Youshi, Urumqi and Shihai.
In addition, the ancients divided the night time into more and more points. There are five meters in one night, one meter is equal to the current two hours. Starting from 7: 00 pm, one meter refers to 7: 00 to 9: 00, two meters refer to 9: 00 to 1 1 point, three meters refer to 1/point to the next morning 1 point, and four meters refer to/.
Extended data:
1, night shift starts at dusk (19-21).
A watch is called dusk, also called sunset, sunset glow, dusk and so on. At this time, the sun has set and it will be dark. The world is dark and everything is hazy, so it is called dusk. At this time, people are still moving.
2. The second watch will make people unconscious (2 1-23 points)
The second watch is in, the celebrity is certain, also known as Ding faint. At this time, the night is already deep, people have stopped their activities, rested and slept, and people are quiet.