Civil-date reference · 1909-10-12
October 12, 1909 BaZi Chart
Tuesday, October 12, 1909 maps to a reference three-pillar record of 己酉 · 甲戌 · 乙巳. The hour pillar remains unresolved until birth time and place are supplied.
Answer first: the reference Day Master for 1909-10-12 is Yi · Yin Wood, and the day pillar is Yin Wood Snake (乙巳). This is a date record, not a complete personal reading.
Deterministic record
1909-10-12 at a glance
| Gregorian date | Tuesday, October 12, 1909 |
|---|---|
| Lunar date | 农历己酉年八月廿九 · lunar month 八月, day 廿九 |
| Reference pillars | 己酉 · 甲戌 · 乙巳 (year · month · day) |
| Day Master | Yi · Yin Wood · heavenly stem 乙 |
| Solar-term position | Day 4 of Cold Dew (寒露), beginning 1909-10-09 |
| Next solar term | Frost Descent (霜降) · 1909-10-24 · 12 days away |
| Western constellation | Libra (天秤) |
Three coordinates, three jobs
What the reference pillars contain
Each stem-branch pair is a deterministic calendar coordinate. Its role changes by pillar position, so the three rows stay separate rather than collapsing into one personality label.
Yin Earth Rooster · Ji You
The visible stem is Ji · Yin Earth; the branch is You · Rooster · Metal. Its Na Yin is 大驿土, and the branch contains hidden stem 辛. Open the full Jiazi record →
Yang Wood Dog · Jia Xu
The visible stem is Jia · Yang Wood; the branch is Xu · Dog · Earth. Its Na Yin is 山头火, and the branch contains hidden stems 戊 · 辛 · 丁. Open the full Jiazi record →
Yin Wood Snake · Yi Si
The visible stem is Yi · Yin Wood; the branch is Si · Snake · Fire. Its Na Yin is 覆灯火, and the branch contains hidden stems 丙 · 庚 · 戊. Open the full Jiazi record →
Calculation boundary
What this date does not settle
The atlas uses a standard civil-date reference so dates can be compared consistently. A real birth happened at a place and an instant, not inside a URL slug.
- Hour pillar: requires birth time after historical timezone and true-solar-time correction.
- Day boundary: a late-night clock time can cross the adopted Zi-hour or solar-day boundary after correction.
- Solar-term boundary: an actual birth instant near a term transition can change the resolved year or month pillar.
- Interpretation: one date or one Jiazi pair does not determine career, relationships, wealth, health, or events.
Every date in October 1909
Resolve the fourth pillar
Calculate the actual birth chart
Add birth time and birthplace. Pillarwise then resolves historical timezone, longitude correction, equation of time, day-boundary risk, and the hour pillar before it generates a chart.
Questions about 1909-10-12
What is the BaZi day pillar for Tuesday, October 12, 1909?
In this civil-date reference, the day pillar is 乙巳 (Yin Wood Snake), cycle position 42 of 60. A personal chart must still resolve the birthplace, local clock time, and day boundary.
What is the Day Master for Tuesday, October 12, 1909?
The reference Day Master is 乙, Yi · Yin Wood. The Day Master is the heavenly stem of the resolved day pillar; it is not a complete personality result.
Can I calculate a complete BaZi chart from 1909-10-12 alone?
No. A complete Four Pillars chart requires birth time and birthplace. Historical timezone, longitude correction, equation of time, and hour or day boundaries can materially change the resolved chart.
Which solar term contains 1909-10-12?
1909-10-12 is day 4 of Cold Dew (寒露) in this date reference. The next solar term is Frost Descent (霜降) on 1909-10-24.