In ancient China, people used the method of "copper pot dripping" to measure time, and divided a day and night into twelve hours, namely, Zi, Ugly, Yin, Mao, Chen, Si, Noon, Wei, Shen, You, Xu and Hai, which correspond to the twenty-four hours today.
the time from 11: to 1: in the middle of the night is Zishi, from 1: to 3: is Ugly, from 3: to 5: is Yinshi, and so on. An hour in ancient times was equivalent to two hours today. Therefore, when clocks and watches were just introduced into China, some people called an hour "Da Shi" and an hour in the new time "Hour".
Later, with the popularity of clocks and watches, the word "big hour" disappeared, but "hour" has been used today.
engraving-ancient time was measured by clepsydra.
The leaky kettle is divided into two parts: the sowing kettle and the receiving kettle. The seeding kettle is divided into two or four floors, all of which have small holes for dripping water, and finally it flows into the receiving kettle. There is an upright arrow in the receiving kettle, and the arrow is engraved with 1 minutes. The arrow gradually rises with the water storage, revealing the engraving number to show the time.
and 24 hours a day is 1 minutes, which is equivalent to 144 minutes now. It can be seen that every moment is equivalent to 14.4 minutes now. So "3: 3 noon" is equivalent to 11: 43.2 noon now
Extended data
Twelve-hour system
It was used in the Western Zhou Dynasty. In the Han dynasty, it was named midnight, crow, pingdan, sunrise, food time, corner, Japan-China, sundial, sunset, dusk and people's decision. It is also represented by twelve earthly branches, with midnight from 23: to 1: as the child, 1: to 3: as the ugly time, and 3: to 5: as the yinshi time, which are recursive in turn.
midnight, also known as midnight and midnight: the first hour of twelve o'clock. (23: to 1: ).
The ugly cock crows, also known as the barren chicken: the second hour of twelve o'clock. (1: to 3: ).
It is also called dawn, morning, sunset, etc. It is the alternation of night and day. (3: to 5: ).
sunrise at dawn, also known as sunrise, dawn and rising sun, refers to the time when the sun just appeared and Ran Ran first rose. (5: to 7: )
Eating in the morning, also known as breakfast, etc.: The time when the ancients "ate in the morning" was breakfast time (7: to 9: ).
The fourth corner, also known as Riyu, is called the corner near noon. (9: to 11: ).
noon, also known as noon, noon, etc.: (11: to 13: ).
The sundown, also known as the setting sun, the sun's center, etc.: the sun's west is the sundial. (13: to 15: ).
the time of application, also known as day shop, evening food, etc.: (15: to 17: ).
It is also called sunset, sunset and evening: it means when the sun goes down. (17 hours to 19 hours).
at dusk, also known as sunset, sunset, evening, etc.: at this time, the sun has set, and it will be dark before it gets dark. The world is dim and everything is hazy, so it is called dusk. (19: to 21: ).
When the sea is dark, people have stopped their activities and gone to sleep. Being calm means being quiet. (21 hours to 23 hours).
resources
Baidu encyclopedia time