The solar column, that is, the day when a person was born, is represented by branches of the lunar calendar. The daily records of the trunk and branches are circulated every 60 days. Due to the different months and leap years, it is necessary to find a perpetual calendar for the trunks and branches every day. The sun column, in the words of life science, starts from midnight to midnight clockwise, with twelve hours as a day, and each hour takes up two hours.
The dividing line between day and day is midnight, that is, eleven o'clock at night. Before eleven o'clock is the last day of Shihai, and after eleven o'clock is the next day. Please pay special attention to this point, and don't think that midnight is the dividing point of the day.
Extended data:
The alternation of day and night is formed by the rotation of the earth. In numerology, the beginning of midnight is the beginning of a new day, so how to determine the time of midnight? In the astronomical calendar, when the sun crosses a certain ground transit at noon, the sun crosses an underground transit (the so-called lower transit is the upper transit of the opposite hemisphere) as the prime time;
The so-called "positive" is the midpoint of the child. According to the ancient calendar, one hour is two hours, so the beginning of Zishi is the hour before the start, which is converted into today's time, that is, 23: 00 local time in a certain area is the beginning of Zishi (called early Zishi in the calendar), which is the beginning of a new day in that area.