What do you mean by birthday, Tian Tong?

Birthday, or eight characters, is actually another way of saying the four pillars of Zhouyi. Four pillars refer to the time when a person was born, that is, year, month, day and hour. When people use "heavenly stem" and "earthly branch" to represent year, month, day and hour respectively, such as Jiazi Year, Shen Bingyue, Xin Ugly Day and Renyin Time. There are two words in each column and eight characters in four columns, so fortune telling is also called "measuring eight characters" According to the relationship between yin and yang attributes and the five elements of heaven and earth, it is inferred that human body is responsible and blessed. However, what I want to talk about here is not how to "measure eight characters", but how to calculate eight characters. The four columns are arranged in a figure of eight, which refers to the year, month, day and time when a person was born. Four-column arrangement refers to finding a person's date of birth. It is mainly divided into four steps. Chronological columns, that is, the year when a person was born, are represented by branches. Note that the dividing line between last year and next year is based on the intersection time of beginning of spring, not on the first day of the first month. For example, a person was born at 22: 00 on February 4, 2000 in the solar calendar 17, and was handed over to beginning of spring at 20: 32 on February 4, 2000 in the lunar calendar, so his chronology is listed as 2000. It is either the end of 1999 or the festival of the year when a person was born is represented by branches and stems. Note that the stem and branch of the month are not based on the first day of each month in the lunar calendar, but on festivals. The festival before handover is last month's festival, and the festival after handover is next month's festival. The Sun Column has been in Lu Yingong for three years since February (722 BC). In China, the record of the days of the branches has never been interrupted. This is the only record of the longest days known to human society so far. The sun column means that the branches and branches of the lunar calendar represent the date of a person's birth. Branches and branch days are recorded once every 60 days. Due to different months and different leap years, it is necessary to find a perpetual calendar for the branch. In addition, the dividing line of a day is divided by hours, that is, before eleven o'clock, it is the time of the previous day. After eleven o'clock, it is midnight the next day. Don't think that midnight is the dividing point of a day. The chronological column indicates the time of birth with branches. One hour in the lunar calendar spans two hours, so there are twelve hours in a day.