How to read when the time is up?

It is the 1 1 hour at twelve o'clock in ancient times, which refers to the time from 19 pm to 2 1 pm in modern times. At this time, the sun has set and it will be dark.

Introduction to twelve o'clock

Twelve o'clock was created by the working people of the ancient Han nationality according to the natural laws of the sun, the changes of the sky and their daily production activities. A day and night is divided into twelve periods, each of which is called an hour. Twelve o'clock can refer to either a day or any time.

It is used at twelve o'clock in Western Zhou Dynasty. In the Han Dynasty, it was named Midnight, Crow, Pingdan, Sunrise, Food Time, Horn, Japan-China, Sundial, Sunset, Dusk and Man's Decision. 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.