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Day Pillar 11 of 60 · Nayin Mountaintop Fire

Jia Xu (甲戌) Day Pillar — Yang Wood on the Dog

The Jia Xu day pillar pairs the Jia day master (Yang Wood) with the Xu branch (Earth, the Dog). Below: the computed facts, what the seat relation and twelve-stage position mean structurally, the nayin gloss, the classical reading of the spouse palace, and an instant lookup for your own pillar.

Computed facts (engine-verified)

This page is generated from the engine, not hand-written; structural facts reconcile against the methodology page.

Day master甲 Jia · Yang Wood
Day branch戌 Xu (Dog) · Earth
Hidden stems戊 Wu (Indirect Wealth, main qi); 辛 Xin (Direct Officer, middle qi); 丁 Ding (Hurting Officer, residual)
Stage of the stem hereNourishment (12 of 12)
NayinMountaintop Fire · 山头火 (shared with Yi Hai 乙亥)
Seat relationStem controls branch (gai tou) — traditional term: 盖头

How Jia sits on Xu

The stem controls the branch: Wood governs Earth, so the Jia day master sits on ground it actively manages. The traditional name is 盖头 (gài tóu, "covering the head") — the stem holds the upper hand over its own seat. Structurally, the day master's authority extends downward into the branch; how that authority is exercised (wisely or abrasively) depends on the other seven characters.

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Nayin: Mountaintop Fire

Mountaintop Fire (山头火): fire on a summit — highly visible, burning where there is little to feed it. The classical caution is supply lines.

The spouse palace (day branch)

In the spouse palace this is a Wealth (财) configuration: the classical reading treats the partner-side branch as something the Jia day master engages and manages. The structural point — stated by the tradition, not by this site — is that closeness here tends to be practical and hands-on. Whether that plays out as partnership or as logistics depends on the full chart, which is why this page makes no claim about any actual marriage.

The main qi 戊 (Wu, Indirect Wealth) defines the palace's classical group: Wealth. Middle/residual tenants: Xin (Direct Officer), Ding (Hurting Officer).

A note on what this page deliberately does not do: the internet is full of "60 personality types" tables that assign a fixed character to each day pillar. This site rejects that framing. A day pillar is a structural position — who sits where, on what kind of ground, with which hidden tenants. The same pillar reads differently under a different month command, and no meaningful judgement exists without the other six characters. Where the tradition offers a reading, it is labelled as the tradition's; this site's own contribution is that every number and term on this page is computed, versioned, and checkable against the methodology page.

Find your own day pillar

Birth date alone is enough — the day pillar never needs a birth time. The calculation runs in your browser; nothing is sent anywhere.

Frequently asked

What is the Jia Xu (甲戌) day pillar?
The Jia Xu day pillar pairs the Jia stem (Yang Wood) with the Xu branch (Earth). Its computed facts: hidden stems Wu (Indirect Wealth), Xin (Direct Officer), Ding (Hurting Officer), the Jia stem at the Nourishment stage on this branch, seat relation "undefined", and nayin Mountaintop Fire (山头火).
How do I find my own day pillar?
Use the calculator on this page (birth date is enough — the day pillar does not need a birth time) or the full chart calculator. Your day pillar is the third pillar of the four; each of the sixty has its own page on this site with the same computed structure.
Is the Jia Xu day pillar good or bad?
Neither, on its own. The seat relation (undefined) and the Nourishment stage describe position and flow, not fortune. A meaningful reading needs the month command and the other six characters — any source that grades pillars as lucky or unlucky is simplifying past what the system itself claims.
What does the nayin Mountaintop Fire mean?
Nayin (山头火) is a two-thousand-year-old classification that gives each PAIR of pillars a symbolic element-image — for Jia Xu it is "Mountaintop Fire", shared with its partner pillar Yi Hai (乙亥). It is a classical gloss layer, published here alongside the structural facts, never instead of them.

Nearby pillars

The other five pillars sharing this day master (Jia):

Jia Zi · Jia Shen · Jia Wu · Jia Chen · Jia Yin

Gui You ←  ·  → Yi Hai

Reference index

Every enumerable component of ba zi has its own page here. Each page is computed by the same engine and can be checked item by item — none of it is a personality table.