What time is twelve o'clock in ancient times?

The names corresponding to time are Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei and Shen.

Twelve-hour system:

It was used in the 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.

Extended information In ancient China, people used the method of "dripping water from a copper pot" to time, and divided a day and night into twelve hours, corresponding to twenty-four hours today. From eleven to midnight, it's ugly from one to three, Yin Shi from three to five, and so on.

When clocks and watches were first introduced into China, some people called an hour "Da Shi" and an hour in the new time "Shi". Later, with the popularity of clocks and watches, the word "big hour" disappeared, but "hour" has been used to this day.

After the founding of the Republic of China, the year, month, day and time were adopted, while the China lunar calendar was retained. When recording the year, a day is divided into 24 hours, which is twice as short as the traditional 12 hour, so it is called an hour.