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Saju guide

How to Read the Year, Month, Day and Hour Pillars

Each of the four pillars in a saju chart has its own area of life and its own way of being calculated. Learn what the year, month, day and hour pillars cover.

Picture a chart laid out as four columns. Reading from right to left, as Korean charts traditionally are, you meet the year, then the month, then the day, and finally the hour. Each column holds two characters: a heavenly stem on top and an earthly branch below. Together they form the eight characters of sajupalja, the full Korean name for a four-pillar chart. Hongsil's chart follows the same layout, so from the left its columns run hour, day, month, year, each with its name printed above it.

Knowing the characters is only half the story. The same character means something slightly different depending on which pillar it sits in. This guide takes the pillars one at a time, explains how each is worked out, and shows how readers combine them.

Stems on top, branches below

First, what the two layers do. The upper character in each pillar is a heavenly stem, one of ten. Stems are often described as the visible face of an energy, the part that shows on the surface.

The lower character is an earthly branch, one of twelve, each linked with a zodiac animal. Branches are usually read as the ground a stem stands on, carrying seasonal and more hidden qualities. Every stem and branch also belongs to one of the five elements, Wood, Fire, Earth, Metal or Water, and leans yin or yang.

A pillar is the pairing of one stem and one branch, and there are sixty possible pairings in the cycle.

The year pillar: background and roots

The year pillar, yeonju (年柱), comes from the year of birth. Its branch is the animal people know as their zodiac sign, called tti in Korean. Since everyone born in the same saju year shares this pillar, readers tend to treat it as the most collective part of the chart. It is linked with family background, ancestry, early childhood, and the impression a person makes in wider society.

The one trap is the start date: the year pillar turns at Ipchun in early February, so a January birthday, or one in the first days of February, belongs to the year before.

The month pillar: season and setting

The month pillar, wolju, is set by the solar terms rather than the calendar month. Twelve of the twenty-four terms mark the start of each saju month, so the month pillar changes partway through Western months, usually early in the month, somewhere between the 3rd and the 9th.

Its branch tells you the season of birth, and that matters more than it may seem. Readers often judge the strength of the day master by the season it was born into. A Wood day master born in spring is in its element; the same stem born in deep autumn is read as working against the season. The month pillar is also linked with parents, siblings, the environment you grew up in, and your place in work and social life.

The day pillar: the self and close partnerships

The day pillar, ilju, is calculated from the date of birth by counting along the sixty-day cycle, which has run continuously regardless of months and years. So it is not something you can read off the calendar date; it is counted from a known starting day, usually by a table or a tool.

This pillar is the heart of most readings. Its stem is the ilgan, the day master, which represents you. Its branch is often called the spouse palace, the area of the chart linked with the closest relationships in your life. When people in Korea talk about their ilju, they usually mean a quick portrait of their temperament drawn from these two characters. On Hongsil the day pillar comes with its name and a nickname built from a color and an animal, such as "blue rat" for Gapja: blue-green is the traditional color of Wood, the element of the stem Gap, and the Rat is the animal of the branch Ja.

Since everything else is read in relation to the day master, a beginner who learns only one pillar should learn this one.

The hour pillar: plans and the later years

The hour pillar, siju, uses twelve two-hour blocks, each named after a branch. The Rat hour spans roughly 11 p.m. to 1 a.m., the Ox hour 1 a.m. to 3 a.m., and so on around the clock. The stem of the hour pillar depends on the stem of the day pillar, so you need the day pillar first.

Readers link the hour pillar with children, students or juniors, private ambitions, and the later part of life. It can add useful detail, but it is also the pillar most likely to be uncertain, because many people do not know their exact birth time. Without it, you still have six characters and the full day pillar to work with.

Reading the pillars together

A common image compares the four pillars to a plant: the year is the root, the month the sprout, the day the flower, and the hour the fruit. Some books also map them loosely onto stages of life, from childhood in the year pillar to later years in the hour pillar. These are rough guides, not strict divisions.

In practice, a reader moves back and forth. They locate the day master, check the season in the month branch, then look across all four pillars for elements that support it, drain it or press against it. Two characters that clash or combine across neighboring pillars may be read as a point of tension or cooperation in that area of life. The interpretation comes from patterns across the whole chart, not from any one pillar in isolation.

FAQ

Which pillar matters most?

Most readers start with the day pillar, because its stem is the day master and stands for the person. The month pillar comes next in many readings since it shows the season, which affects how strong the day master is. The other two pillars fill in background and later themes.

Why isn't my day pillar obvious from my birthday?

The day pillar follows a sixty-day cycle that runs without breaks across months and years. It does not reset on the first of the month, so it has to be counted from a known reference point, which is why charts are usually calculated by a tool or a table.

What happens if my birth time is near the edge of a two-hour block?

A birth close to the boundary between two hours can land in either block depending on the exact minute and how local time is handled. Readers often look at both possible hour pillars and see which description fits better, while relying mainly on the other three pillars.

Related

Part of the dotorium saju guide. Saju readings are for fun and reflection, not for making decisions.