← All sixty day pillars

Day Pillar 55 of 60 · Nayin Sky Fire

Wu Wu (戊午) Day Pillar — Yang Earth on the Horse

The Wu Wu day pillar pairs the Wu day master (Yang Earth) with the Wu branch (Fire, the Horse). 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戊 Wu · Yang Earth
Day branch午 Wu (Horse) · Fire
Hidden stems丁 Ding (Direct Resource, main qi); 己 Ji (Rival, middle qi)
Stage of the stem hereProsperity (5 of 12)
NayinSky Fire · 天上火 (shared with Ji Wei 己未)
Seat relationBranch generates stem (de di) — traditional term: 得地

How Wu sits on Wu

The branch generates the stem: Fire feeds Earth, so the Wu day master is seated on ground that keeps producing it. In traditional wording this is 得地 (dé dì, "gaining ground") — the self is resupplied by its own base. The practical consequence is structural, not predictive: whatever else the chart does, this day master starts from a position where its root is being actively replenished rather than taxed.

undefined

Nayin: Sky Fire

Sky Fire (天上火): fire of the noon sky — the sun itself among the nayin. Maximum radiance, zero concealment.

The spouse palace (day branch)

In the spouse palace this is a Resource (印) configuration: the classical reading treats this branch as a seat that Wu's partner-side Wu supplies and protects. The structural point — stated by the tradition, not by this site — is that closeness here tends to feel sustaining rather than demanding. Whether that is true of any actual marriage depends on the whole chart, which is precisely why this page makes no prediction.

The main qi 丁 (Ding, Direct Resource) defines the palace's classical group: Resource. Middle/residual tenants: Ji (Rival).

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 Wu Wu (戊午) day pillar?
The Wu Wu day pillar pairs the Wu stem (Yang Earth) with the Wu branch (Fire). Its computed facts: hidden stems Ding (Direct Resource), Ji (Rival), the Wu stem at the Prosperity stage on this branch, seat relation "undefined", and nayin Sky Fire (天上火).
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 Wu Wu day pillar good or bad?
Neither, on its own. The seat relation (undefined) and the Prosperity 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 Sky Fire mean?
Nayin (天上火) is a two-thousand-year-old classification that gives each PAIR of pillars a symbolic element-image — for Wu Wu it is "Sky Fire", shared with its partner pillar Ji Wei (己未). 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 (Wu):

Wu Chen · Wu Yin · Wu Zi · Wu Xu · Wu Shen

Ding Si ←  ·  → Ji Wei

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.