Date of birth, abbreviated as eight characters, refers to the calendar date when a person is born; Year, month and day have four pillars and branches, each with two words, a total of eight words, so it is called. Birthday plays an important role in Han folk beliefs, and ancient Han astrologers calculate people's fate accordingly. Eight-character prediction is developing continuously in practice. From Li's tripartite confrontation to Li's tripartite confrontation, and then to the four pillars of the sun, the moon and the moon, every step of progress contains the hard work of scholars and social practice activists in past dynasties.
In order to get the correct birth time, the ancient Han people thought that the sundial instrument was the most accurate measurement during the day. When the clock time is the artificial average time and the regional standard, it is necessary to calculate the "apparent solar time difference" according to the solar terms (ecliptic) and the "local longitude time difference" according to the place of birth, so as to get the real astronomical birth time. In the almanac, there are basically annual and daily branches, while monthly and hourly branches can be calculated according to the annual and daily branches. Monthly trunk and annual trunk branches refer to 1 chart and monthly table.
Date of birth ranks:
First, the chronological column
Chronicle, that is, the year when a person was born, is expressed by stem and branch. Note: The dividing line between last year and next year is based on the intersection time here in beginning of spring, not on the first day of the first month. For example, if someone was born at 22: 00 on February 4th in the solar year, and the handover time from the lunar year to beginning of spring is at 20: 32 on February 4th in the solar year, the year of this person is listed as Chen Geng in that year, not the end of the year.
Second, the moon column.
Moon column, that is, the festival in which the stems and branches represent the date of birth. Note that the monthly branch is not divided by the first day of each month in the lunar calendar, but by festivals. The festival before the handover is the festival of last month, and the festival after the handover is the festival of next month.
The lunar calendar takes November as the second month, December as the ugly month, and January as silver moon. Followed by Uzuki in February, Chen Yue in March, Mitsuki in April, noon in May, moonless in June, Shen Yue in July, unitary month in August, garrison month in September, and 10 sea month. But unlike December, it is marked by 24 solar terms. Birthday hand algorithm. In this way, as long as you know the month of the zodiac calendar, you will know the earthly branch of the zodiac month.
Third, the sun column
Rizhu, the date of birth of the representative of the main branch of the lunar calendar, is recorded every 60 days. Because of the difference between big and small months and leap years, the Japanese branch needs to find a perpetual calendar. In addition, the dividing line between day and day is divided by hours, that is, before eleven o'clock is the hour of the previous day, and after eleven o'clock is the hour of the next day. Don't think that midnight is the dividing point.
Heavenly stems and earthly branches's birthday calculation is very complicated. Decided by the ancient fortune teller, and then pushed down in turn. If you want to know your birthday, you can only check the comparison between perpetual calendar, solar calendar and perpetual calendar. If you don't know how many calendars you have, you can look up the perpetual calendar.
Fourth, the time bar.
The time column represents the time when a person was born. One hour spans two hours in the lunar calendar, so there are twelve hours in total.