In ancient times, a day was 12 hours. What time do they mean in modern times?

Zi Shi, Chou Shi, Yin Shi, Shi Mao, Chen Shi, Shi Si, Noon, Wei Shi, Shen Shi, You Shi, Shu Shi and Shi Hai correspond to 23: 00 to 1, 1 to 3: 00, 3: 00 to 5: 00, 5: 00 to 7: 00 and respectively. 15 hours to 17 hours, 17 hours to 19 hours, 19 hours to 2 1 hour and 2 1 hour to 23 hours.

In ancient China, the twelve-hour system was widely used, and each earthly branch corresponded to a fixed time period (hour). In ancient times, China divided a day and night into twelve sections, and each section was called one hour, which is now two hours. Every hour has a fixed name. From eleven o'clock at night, the first hour is midnight, that is, from eleven o'clock to one o'clock at midnight.

Extended data

The history of time

1, 12 hour system

It was used in the Western Zhou Dynasty. In the Han dynasty, it was named midnight, crow, pingdan, sunrise, food time, corner, day, sundial, sunset, dusk and people's decision. It is also represented by the twelve earthly branches, with the midnight from 23: 00 to 1: 00 as the sub-hour, 1: 00 to 3: 00 as the sub-hour, and 3: 00 to 5: 00 as the Yin Shi time, which are circulated in turn.

2.24-hour system

After the Song Dynasty, every hour in the twelve hours was divided into two parts, namely, the beginning of the son, the beginning of the son, the beginning of ugliness and the beginning of ugliness ... Conversely, it happened to be 24 hours, which is consistent with the current 24 hours a day.

3. Ten-hour system

Appeared in the pre-Qin period. Five minutes during the day and five minutes at night. According to Tian Wenzhi of Sui Shu, a day is morning, evening, middle and middle. Night is A, B, C, D, E (later expressed by the five watch). In ancient times, it was regarded as a watch at night, a watch at sea, a watch at home, a watch at home, a watch at home, a watch at home, a watch at home. Divide the night into five classes, beat drums according to each class, and each class has five points.

4. Fifteen-hour working week

Its names are Chen Ming, Yongming, Danming, flea (morning) food, banquet (evening) food, corner, center, less return, shop hours, big return, high return, low return, county (suspended) east, dusk and Ding faint. See Huai Nan Zi. Astronomical training.