Civil-date reference · 1998-12-21
December 21, 1998 BaZi Chart
Monday, December 21, 1998 maps to a reference three-pillar record of 戊寅 · 甲子 · 壬寅. The hour pillar remains unresolved until birth time and place are supplied.
Answer first: the reference Day Master for 1998-12-21 is Ren · Yang Water, and the day pillar is Yang Water Tiger (壬寅). This is a date record, not a complete personal reading.
Deterministic record
1998-12-21 at a glance
| Gregorian date | Monday, December 21, 1998 |
|---|---|
| Lunar date | 农历戊寅年十一月初三 · lunar month 十一月, day 初三 |
| Reference pillars | 戊寅 · 甲子 · 壬寅 (year · month · day) |
| Day Master | Ren · Yang Water · heavenly stem 壬 |
| Solar-term position | Day 15 of Major Snow (大雪), beginning 1998-12-07 |
| Next solar term | Winter Solstice (冬至) · 1998-12-22 · 1 day away |
| Western constellation | Sagittarius (射手) |
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 Earth Tiger · Wu Yin
The visible stem is Wu · Yang Earth; the branch is Yin · Tiger · Wood. Its Na Yin is 城头土, and the branch contains hidden stems 甲 · 丙 · 戊. Open the full Jiazi record →
Yang Wood Rat · Jia Zi
The visible stem is Jia · Yang Wood; the branch is Zi · Rat · Water. Its Na Yin is 海中金, and the branch contains hidden stem 癸. Open the full Jiazi record →
Yang Water Tiger · Ren Yin
The visible stem is Ren · Yang Water; the branch is Yin · Tiger · Wood. Its Na Yin is 金箔金, and the branch contains hidden stems 甲 · 丙 · 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 December 1998
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 1998-12-21
What is the BaZi day pillar for Monday, December 21, 1998?
In this civil-date reference, the day pillar is 壬寅 (Yang Water Tiger), cycle position 39 of 60. A personal chart must still resolve the birthplace, local clock time, and day boundary.
What is the Day Master for Monday, December 21, 1998?
The reference Day Master is 壬, Ren · Yang Water. 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 1998-12-21 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 1998-12-21?
1998-12-21 is day 15 of Major Snow (大雪) in this date reference. The next solar term is Winter Solstice (冬至) on 1998-12-22.