Day pillars

Xin You 辛酉

White Rooster · A fine sword clear as autumn frost

Stage · PrimeSeated · CompanionKorean · sinyu ilju
StructureMetal Day Master × the Rooster (Metal)

Yin Metal — a polished jewel. Your day branch carries the same metal energy as your Day Master — you are seated on your own root.

Twelve-stagePrime

Earning its own keep. Self-reliance and practical competence sit firmly in this seat.

Seated Ten GodCompanion

Your own energy is seated in your inner room. Backbone is solid and you stand well alone — and you meet the people closest to you as equals, which can mean bumping into them.

Hidden stems Geng · Rival · 10d Xin · Companion · 20d

The stems concealed inside (Rooster). A branch is not one single energy — it holds this mixture, in these proportions across a 30-day month.

A fine sword clear as autumn frost — sharpness taken to its limit. Standards, taste and self-discipline are set like a blade, and when that blade turns inward it is hardest on its owner.

Is Xin You actually your day pillar?

The day pillar shifts on solar-term and zi-hour boundaries, so it is not countable by eye. Enter your birth date and the engine computes it in under a minute — free, no account.

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Frequently asked

How do I know if I have the Xin You day pillar?

Your day pillar is the stem-branch pair governing the day you were born — Xin You (辛酉) in this case. It rotates every day through a cycle of sixty, and the boundaries depend on solar terms and the 11pm zi-hour rule, so it is not something you can count by eye. Enter your birth date in our free reading and the engine computes it directly.

What is the Xin You day pillar like?

White Rooster — the image traditionally attached to it is "A fine sword clear as autumn frost". Your Day Master 辛 (Yin Metal — a polished jewel) sits on 酉, the Rooster, which carries Metal. In the twelve-stage cycle that position reads as Prime, and the seated Ten God is Companion.

Does my day pillar tell me my whole chart?

No. The day pillar is two characters out of eight — your core axis, not the whole picture. The year, month and hour pillars, the balance of the five elements, and your decade luck all have to be laid on top before a reading means much. Treat a day-pillar page as the doorway, not the room.

Why is it called Jia Zi in Chinese and something else in Korean?

Same sixty-cycle, different reading of the same characters. 辛酉 is romanised Xin You from Mandarin and sinyu from Korean, and Korean saju calls the day pillar ilju (일주). The calculation is identical; the interpretive traditions differ.

Other pillars with the same Day Master ()

Other pillars seated on the Rooster ()

See all 60 day pillars ›

The twelve-stage position, seated Ten God and hidden stems are computed by the Ioreum deterministic engine (ruleset ioreum-2026.07). The reading itself is interpretation from the day-pillar tradition, not verified science — we always tell you which part is calculation and which part is tradition.