What does eight characters mean?

The date of birth is a traditional record of China's personal date and time of birth. It expresses the year, month, day and time of a person's birth through heavenly stems and earthly branches's two Chinese characters, one column and four columns. This record is eight words, so it is called "birthday". 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, Guichou Day and Renyin Time, it contains the basic state of celestial movement when a person is born. 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. In order to get the correct time of birth, the sundial is 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 eight characters, the annual and daily branches are continuous and true; The branch of month and time is calculated according to the branch of year and day, which can be said to be virtual. At present, the common process of transforming the date of birth (calculated according to the lunar calendar) into a birthday by a numerology master is called carving eight characters. Then it will be interpreted by the numerology history. Birthdays are usually used for divination and marriage, and they are still popular among the people. Birthdays are used in marriage to predict whether two people will be happy in their future marriage. Generally speaking, the birthdays of both men and women are born together, which means that married life is happy, and mutual restraint means that they are unhappy. Some people think that the outcome of birthdays is very important. If their birthdays are equal, they may give up their marriage with one party. Birthday can only reflect the date of a person's birth at most, so it is not too much to record the time. Some people use birthdays to tell fortune, which is very unreliable. Because a person's fate is influenced by many conditions, besides the weather, there are also the limitations of the region and people where he grew up, and the different opportunities, what proportion can the influence of birth time account for? Report to the authorities