Civil-date reference · 1991-01-30
January 30, 1991 BaZi Chart
Wednesday, January 30, 1991 maps to a reference three-pillar record of 庚午 · 己丑 · 庚子. The hour pillar remains unresolved until birth time and place are supplied.
Answer first: the reference Day Master for 1991-01-30 is Geng · Yang Metal, and the day pillar is Yang Metal Rat (庚子). This is a date record, not a complete personal reading.
Deterministic record
1991-01-30 at a glance
| Gregorian date | Wednesday, January 30, 1991 |
|---|---|
| Lunar date | 农历庚午年十二月十五 · lunar month 十二月, day 十五 |
| Reference pillars | 庚午 · 己丑 · 庚子 (year · month · day) |
| Day Master | Geng · Yang Metal · heavenly stem 庚 |
| Solar-term position | Day 11 of Major Cold (大寒), beginning 1991-01-20 |
| Next solar term | Start of Spring (立春) · 1991-02-04 · 5 days away |
| Western constellation | Aquarius (水瓶) |
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.
Yang Metal Horse · Geng Wu
The visible stem is Geng · Yang Metal; the branch is Wu · Horse · Fire. Its Na Yin is 路旁土, and the branch contains hidden stems 丁 · 己. Open the full Jiazi record →
Yin Earth Ox · Ji Chou
The visible stem is Ji · Yin Earth; the branch is Chou · Ox · Earth. Its Na Yin is 霹雳火, and the branch contains hidden stems 己 · 癸 · 辛. Open the full Jiazi record →
Yang Metal Rat · Geng Zi
The visible stem is Geng · Yang Metal; the branch is Zi · Rat · Water. Its Na Yin is 壁上土, and the branch contains hidden stem 癸. 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 January 1991
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 1991-01-30
What is the BaZi day pillar for Wednesday, January 30, 1991?
In this civil-date reference, the day pillar is 庚子 (Yang Metal Rat), cycle position 37 of 60. A personal chart must still resolve the birthplace, local clock time, and day boundary.
What is the Day Master for Wednesday, January 30, 1991?
The reference Day Master is 庚, Geng · Yang Metal. 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 1991-01-30 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 1991-01-30?
1991-01-30 is day 11 of Major Cold (大寒) in this date reference. The next solar term is Start of Spring (立春) on 1991-02-04.