Ding You 丁酉 Day Pillar
Ding You 丁酉 is number 34 of the sixty. The Day Master is Ding 丁, yin Fire; the branch You 酉 is Metal, zodiac Rooster. Na Yin is Fire at the Foot of the Mountain.
At a glance
| Position in the cycle | 34 / 60 |
|---|---|
| Day Master (stem) | 丁 |
| Day branch | 酉 |
| Day Master element | yinFire |
| Branch element | Metal |
| Zodiac | Rooster |
| Na Yin | Fire at the Foot of the Mountain |
| Hidden stems | Xin 辛 |
| Void branches | Chen 辰, Si 巳 |
Hidden stems and their Ten Gods
A branch is more than its surface element. You 酉 hides Xin 辛; read against the Day Master Ding 丁 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 |
|---|---|---|
| Xin 辛 | Metal | Indirect Wealth |
Next Ding You 丁酉 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 Ding You 丁酉 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 Ding 丁. Two people born in the same year and month with different day stems therefore have completely different charts. In Ding You 丁酉 the Day Master Ding 丁 is yin Fire and sits on You 酉, which is Metal; the relation between them is Day Master controls the branch. This seat is classically read as the Day Master's immediate environment.
Related pillars
The other five pillars sharing the Day Master Ding 丁, and the other four sharing the branch You 酉:
Same Day Master (Ding 丁)
Same branch (You 酉)
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