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Find your Day Master —
the one character that stands for you

Basics · October 2026 · 7 min read

What is the Day Master in saju, and why does it stand for you?

A saju (사주, 四柱) chart writes the year, month, day and hour of your birth as four pillars, each with a heavenly stem on top and an earthly branch underneath — eight characters in all. Most people first think of their zodiac animal, which sits at the bottom of the year pillar. But the reading method used across Korea, the Chinese-speaking world and Japan today, the Ziping method, puts the day at the center. The year pillar speaks to background, the month pillar to the season you were born in, the hour pillar to what comes later, and the day pillar to you. Its top half is the Day Master.

Once you know it, the rest of the chart gets a grammar. A character with the same element as yours is a companion; one your element feeds is an outlet for expression; one that feeds you is support. These relationships are called the ten gods (sipsin, 十神). Without the Day Master, a saju reading has no subject.

How do I find my Day Master in a Manseryeok chart?

Enter your birth date in a Manseryeok (만세력, the Korean pillar calendar), find the day pillar, and read its top character. You do not need your birth hour; the date alone is enough.

• Enter the date in the right calendarKorean tools ask whether the date is solar (양력) or lunar (음력). Type a lunar birthday in as solar and the whole date shifts, and so does your Day Master. It is the most common mistake.
• Locate the day pillarKorean Manseryeok charts usually run right to left: year pillar on the far right, hour pillar on the far left. If you entered an hour, the day pillar is second from the left. Layouts vary, so look for the label ilju (일주, 日柱).
• Read the top rowThe top row holds the heavenly stems and the bottom row the earthly branches. The top character of the day pillar is your Day Master. If your day pillar is 甲子, your Day Master is 甲, Yang Wood.

Two details catch people out. First, the Day Master changes with the calendar day, not at Ipchun. Ipchun (입춘, 立春), the solar term in early February, is where the year pillar and your zodiac animal turn over. The day pillar simply moves one step through the sixty-day cycle every day, without a break. Someone born in January may need to double-check their zodiac animal, but not their Day Master.

Second, if you were born close to midnight, your Day Master can shift by one day. Schools differ on how to handle the Rat hour (jasi, 子時) that straddles midnight, and if you were born outside Korea, your local standard time comes into play too. In that case, read birth time correction first. For the order in which to read a whole chart, see how to read a saju chart.

And when Koreans talk about a gapja ilju (甲子) or byeongo ilju (丙午), they mean the whole two-character day pillar. The Day Master is only its top character.

What are the ten Day Masters like?

The images make the ten easy to remember, and they are nearly the same in Korean, Chinese and Japanese sources. One rule for reading the keywords: there is no good or bad Day Master. A tall tree gives shade, and it can also snap in a storm. Dew is tiny, and it reaches everywhere. Yang Metal’s decisiveness can look like stubbornness on a tired day; Yin Water’s sensitivity can turn into overthinking. Every Day Master carries the strengths of its image and, from the same image, a few things worth watching.

What is the difference between yin and yang Day Masters of the same element?

Yang stems push their energy outward and on a large scale; yin stems gather it inward and use it with finesse. 甲 and 乙 are both wood, but one is a tree standing tall on its own and the other is a vine that spreads by leaning on whatever is around it.

Let’s clear up a common misunderstanding: yin and yang here have nothing to do with gender. A yang Day Master is not masculine and a yin one is not feminine; they are two ways the same element behaves, anyone can be born under any of the ten, and readings use the same yardstick for everyone. Yang is not stronger than yin, either. A candle looks small next to the sun, but in a dark room the candle is the one you need.

Does my Day Master decide my personality?

The biggest variable is the month branch, called wollyeong (월령, 月令), the season of your birth. Yang Wood born in spring is a tree full of sap; Yang Wood born in deep winter is a tree in frozen ground, waiting. That is why saju judges whether a Day Master is strong (singang) or weak (sinyak) from the season and all eight characters together.

The second variable is how the ten gods are spread around you. A chart full of output characters (siksin, sanggwan) leans toward expression; one full of resource characters (jeongin, pyeonin) leans toward learning and being supported. Whether the five elements are even or bunched to one side matters too, as covered in five elements balance.

So saying I’m Yang Fire, that’s just how I am uses saju far too narrowly. Treat your Day Master keywords as the first line of a description, and look for the rest in the chart as a whole.

How is the Day Master used in Korea — readings, gunghap and travel?

It is the first thing a reader points to, the first thing compared for compatibility, and an easy way to pick a route through Seoul.

• At a reading — at a saju café or a reader’s office, the chart usually opens with the Day Master, and ‘you are Yang Wood’ becomes the subject of the whole session.
• Gunghap (궁합, compatibility) — two Day Masters are set side by side to see whether their elements feed each other or check each other. Pairs that form a stem combination — 甲 with 己, 乙 with 庚, 丙 with 辛, 丁 with 壬, 戊 with 癸 — come up often. A controlling pair is usually read today as two people who sharpen each other, and a full gunghap also weighs zodiac animals and both charts. More in Korean gunghap compatibility.
• Travel — your Day Master’s element makes a light starting point for choosing a Seoul neighborhood: wood points east toward the palaces, water north toward the mountains. The routes are in Seoul by your element. The element you might want to boost, though, comes from your whole chart.

If you are curious about your own Day Master, open your chart in 5htrip. You can look through your Day Master and your five-element spread in five languages, and viewing your chart is free.