Hours, the ancients divided a day into twelve hours.

According to legend, each time is named according to the time of the animals in the zodiac.

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. From eleven o'clock to one o'clock in the middle of the night, it's ugly from one to three o'clock, yinshi from three to five o'clock, 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 to this day.

Extended data:

Time is an ancient unit of time. The ancients divided a day into twelve hours, and each hour is equal to two hours now. According to legend, each time is named according to the time of the animals in the zodiac.

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. From eleven o'clock to one o'clock in the middle of the night, it's ugly from one to three o'clock, yinshi from three to five o'clock, 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 to this day.

References:

Baidu Encyclopedia-Time