Which year, month, day and time play a leading role in the date of birth?

In the date of birth, the day plays a leading role, with the day representing oneself, the year column representing parents, the month column representing brothers and the hour column representing future generations.

But the eight characters are all four pillars together, and the four pillars are interrelated, so it is not allowed to just look at the same.

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. From Li's three pillars to Li's four pillars, and then to Lei's four pillars, the eight-character prediction has been developing continuously in practice. Every step forward includes 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.