Wu Yin 戊寅 Day Pillar
Wu Yin 戊寅 is number 15 of the sixty. The Day Master is Wu 戊, yang Earth; the branch Yin 寅 is Wood, zodiac Tiger. Na Yin is Earth of the City Wall.
At a glance
| Position in the cycle | 15 / 60 |
|---|---|
| Day Master (stem) | 戊 |
| Day branch | 寅 |
| Day Master element | yangEarth |
| Branch element | Wood |
| Zodiac | Tiger |
| Na Yin | Earth of the City Wall |
| Hidden stems | Jia 甲, Bing 丙, Wu 戊 |
| Void branches | Shen 申, You 酉 |
Hidden stems and their Ten Gods
A branch is more than its surface element. Yin 寅 hides Jia 甲, Bing 丙, Wu 戊; read against the Day Master Wu 戊 they give the Ten God relations below. Hidden stems are what element strength is actually judged on — counting only the four visible stems badly understates what the branches carry.
| Hidden stems | Day Master element | Ten God |
|---|---|---|
| Jia 甲 | Wood | Seven Killings |
| Bing 丙 | Fire | Indirect Resource |
| Wu 戊 | Earth | Friend |
Next Wu Yin 戊寅 days
Day pillars run on a fixed 60-day cycle independent of month and year. The dates below are derived straight from the day count, so no calendar reform affects them.
- Calculating…
Where Wu Yin 戊寅 sits in a chart
The day pillar is the only one read from itself — every Ten God in the year, month and hour pillars is defined relative to the Day Master Wu 戊. Two people born in the same year and month with different day stems therefore have completely different charts. In Wu Yin 戊寅 the Day Master Wu 戊 is yang Earth and sits on Yin 寅, which is Wood; the relation between them is branch controls the Day Master. This seat is classically read as the Day Master's immediate environment.
Related pillars
The other five pillars sharing the Day Master Wu 戊, and the other four sharing the branch Yin 寅:
Same Day Master (Wu 戊)
Same branch (Yin 寅)
Sources
- lunar-javascript (6tail, MIT) — solar-term instants, 干支 pillars, 大運/流年, 胎元/命宮/身宮 and the almanac tables.
- Hong Kong Observatory, Date and Time of the 24 Solar Terms — the reference used to check solar-term instants.
- Xieji Bianfang Shu and Sanming Tonghui — classical sources for the Wuhu Dun and Wushu Dun stem rules, hidden stems and the Ten Gods.
Algorithms last checked: 2026-07 · Method and accuracy