7:00 to 9:00 a.m. is Chen hour, and 9:00 to 11 is Si hour.
Each night starts at 11 o'clock and enters the next day's sub-hour, which is the dividing point between the two days until early morning. 1 o'clock ends at 11 o'clock and 1 o'clock is Zi hour. 1 o'clock and 3 o'clock are Chou time. 3 o'clock to 5 o'clock are Yin time. 5 o'clock and 7 o'clock are Mao time. 7 a.m. and 9 am are Chen time. 9 o'clock and 11 are Si hour 11 to 1 o'clock Noon hour 1 to 3 o'clock is Wei hour 3 pm to 5 pm Shen hour 5 pm to 7 pm is Unit time 7 pm to 9 pm is Xu hour 9 pm to 11 pm is Hai hour It's past 11 o'clock It’s Zi Time again. In the past, some people argued that 12 o’clock should be the dividing point for Zi Time. After the development of the Book of Changes in the past few years, 11 o’clock has been recognized as the dividing point.