When is 8 pm? When? when?

The ancient ones are calculated by time.

19:00-2 1:00 is a watch, and 2 1:00-23:00 is a watch.

23:00-0 1:00 is the third watch and 0 1:00-03:00 is the fourth watch.

03:00-05:00 is the fifth shift.

In ancient times, a day and night was divided into twelve hours and ninety-six hours, and a moment was about 15 minutes. ("carve" the gap on the drip bucket at the original specified time. Drop a bucket day and night). "Time" and "time" are actually two sets of timing system units, and it is more troublesome to convert them. The average hour is eight and a third hours, which is about 14 minutes and 24 seconds.

Extended data

12 hour clock

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.

Midnight, also known as midnight and midnight: the first hour of twelve o'clock. (23 o'clock to 0 1 point).

The ugly cock crows, also known as the pheasant: the second hour of twelve o'clock. (0 1 to 03: 00).

Yin Shiping Dan, also known as Dawn, Dawn and Tiandan, etc. The current position time is alternating day and night. (03 o'clock to 05 o'clock).

Sunrise in Shi Mao, also known as the beginning of the day, dawn and rising sun, refers to the time when the sun just appeared and Ran Ran first rose. (05: 00 to 07: 00)

When eating in the morning, it is also called breakfast. It was breakfast time (07: 00 to 09: 00) when the ancients "ate food".

Forty holes, also known as Yu Ri. Near noon, it is called the corner. (09: 00 to 1 1: 00).

Noon noon, also known as the sun, noon, etc. : (1 1: 00 to 13: 00).

Sunset, also known as sunset, sun center, etc. To the west of the sun is a sundial. (from 13 to 15).

Application time, also known as day shop, late food, etc. : (15: 00 to 17: 00).

As time goes by, it is also called sunset, sunset and evening: it means when the sun goes down. (from 17 to 19).

Dusk, also known as sunset, sunset glow, dusk, etc. At this time, the sun has set and the sky will be dark. The world is dark and everything is hazy, so it is called dusk. (from 19 to 2 1).

At this time, the night is deep and people have stopped taking a rest. Calm means quiet. (2 1 to 23: 00).

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