Civil-date reference · 2009-02-13
February 13, 2009 BaZi Chart
Friday, February 13, 2009 maps to a reference three-pillar record of 己丑 · 丙寅 · 己丑. The hour pillar remains unresolved until birth time and place are supplied.
Answer first: the reference Day Master for 2009-02-13 is Ji · Yin Earth, and the day pillar is Yin Earth Ox (己丑). This is a date record, not a complete personal reading.
Deterministic record
2009-02-13 at a glance
| Gregorian date | Friday, February 13, 2009 |
|---|---|
| Lunar date | 农历己丑年正月十九 · lunar month 正月, day 十九 |
| Reference pillars | 己丑 · 丙寅 · 己丑 (year · month · day) |
| Day Master | Ji · Yin Earth · heavenly stem 己 |
| Solar-term position | Day 10 of Start of Spring (立春), beginning 2009-02-04 |
| Next solar term | Rain Water (雨水) · 2009-02-18 · 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.
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 Fire Tiger · Bing Yin
The visible stem is Bing · Yang Fire; the branch is Yin · Tiger · Wood. Its Na Yin is 炉中火, and the branch contains hidden stems 甲 · 丙 · 戊. 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 →
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 February 2009
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 2009-02-13
What is the BaZi day pillar for Friday, February 13, 2009?
In this civil-date reference, the day pillar is 己丑 (Yin Earth Ox), cycle position 26 of 60. A personal chart must still resolve the birthplace, local clock time, and day boundary.
What is the Day Master for Friday, February 13, 2009?
The reference Day Master is 己, Ji · Yin Earth. 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 2009-02-13 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 2009-02-13?
2009-02-13 is day 10 of Start of Spring (立春) in this date reference. The next solar term is Rain Water (雨水) on 2009-02-18.