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Day Pillar 34 of 60 · Nayin Foothill Fire

Ding You (丁酉) Day Pillar — Yin Fire on the Rooster

The Ding You day pillar pairs the Ding day master (Yin Fire) with the You branch (Metal, the Rooster). 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丁 Ding · Yin Fire
Day branch酉 You (Rooster) · Metal
Hidden stems辛 Xin (Indirect Wealth, main qi)
Stage of the stem hereBirth (1 of 12)
NayinFoothill Fire · 山下火 (shared with Bing Shen 丙申)
Seat relationStem controls branch (gai tou) — traditional term: 盖头

How Ding sits on You

The stem controls the branch: Fire governs Metal, so the Ding 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: Foothill Fire

Foothill Fire (山下火): fire at the foot of the mountain — warmth and hearth rather than spectacle.

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 Ding 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 辛 (Xin, Indirect Wealth) defines the palace's classical group: Wealth.

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 Ding You (丁酉) day pillar?
The Ding You day pillar pairs the Ding stem (Yin Fire) with the You branch (Metal). Its computed facts: hidden stems Xin (Indirect Wealth), the Ding stem at the Birth stage on this branch, seat relation "undefined", and nayin Foothill Fire (山下火).
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 Ding You day pillar good or bad?
Neither, on its own. The seat relation (undefined) and the Birth 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 Foothill Fire mean?
Nayin (山下火) is a two-thousand-year-old classification that gives each PAIR of pillars a symbolic element-image — for Ding You it is "Foothill Fire", shared with its partner pillar Bing Shen (丙申). 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 (Ding):

Ding Mao · Ding Chou · Ding Hai · Ding Wei · Ding Si

Bing Shen ←  ·  → Wu Xu

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.