What are the four pillars? How to calculate?

Four pillars is a term in the Book of Changes. In ancient times, astrologers arranged four columns with the characters of year, month, day and time. The four pillars are the year, month, day and hour of a person's birth, which are called the annual column, the moon column, the sun column and the time column respectively.

1, annual column

Chronicle, that is, the year when a person was born, is expressed by the branches of the solar calendar, that is, the chronology of branches. The annual column update is based on the beginning of each spring. The four pillars and eight characters are all based on the solar terms, and do not refer to any lunar calendar content. Dry calendar belongs to solar calendar. Take beginning of spring as the first year.

2. Moon Column

The moon column, a branch of the lunar calendar, represents the festival when people are born. 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.

3. Rizhu

The solar column refers to the phenomenon that when the weather is very cold and the sun just rises or sets, the flaky ice crystals in the atmosphere reflect sunlight and produce a vertically extending light column directly above or below the sun, which generally lasts only about 1 minute.

4. Time bar

The trunk of birth time is the time column in the eight characters, and most of the trunk of time is not in the calendar, so it is necessary to calculate the trunk of time according to its birthday.

Extended data:

The four pillars are composed of eight characters, namely "annual stem, annual branch", "monthly stem, monthly branch", "daily stem, daily branch", "daily stem, daily branch". Each combination is called "column", which forms "year column", "moon column", "sun column" and "time column", so the four columns are also called "eight characters" or "four columns and eight characters". Take the Japanese Lord as me (Japanese Lord, life Lord), and focus on checking the restraint of the five elements between the four pillars and the connection of punishment.

Baidu Encyclopedia-Four Pillars