Ancient twelve o'clock and time comparison table
The ancients divided a day and night into twelve periods, and each period was called an hour. Twelve o'clock can mean a day or any time. Twelve o'clock is the original creation created by the ancients according to the appearance and appearance of the sun, the change of the sky and the natural laws of their daily production activities and living habits.
Twelve o'clock consists of twelve specific time nouns, namely, Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai. People can trace the origin of these words from ancient books in the pre-Qin period. Before the Han Dynasty, these appellations were different. It was not until the early years of the Han Dynasty that taichu calendar Law was implemented in China.
12 hour clock
Twelve-hour system was adopted 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, and it was also represented by twelve earthly branches. When midnight is from 23: 00 to 1: 00, recursively, 1: 00 to 3: 00 is ugly time, and 3: 00 to 5: 00 is Yin Shi time.
The twelve o'clock calendar is unique and has a long history. It is an outstanding contribution of the Chinese nation to the astronomical calendar of mankind and one of the splendid treasures of Chinese culture. Twelve o'clock integrates the twelve o'clock regimen in Huangdi Neijing into people's daily life through timing tools to remind people of scientific regimen at any time. Twelve o'clock is equivalent to 24 hours, and each hour is equivalent to 2 hours. It is clearly pointed out in the New Tang Calendar that "the ancient calendar divides the day and begins at midnight", with the midpoint of the hour as today's zero (24 o'clock).