Jia Zi (甲子) — Yang Wood on the Rat
A seed of yang wood germinating under winter water.
- Heavenly stem
- 甲 · Jia · Yang Wood
- Earthly branch
- 子 · Zi · Rat
- Na Yin
- Gold in the Sea
- Hidden stems
- Gui
- Hidden gods
- Direct Resource
- Branch element
- Water
Yang wood rising out of still water — a reed pushing through a cold pond.
In BaZi, the day pillar is the pillar of the self. Its heavenly stem is your Day Master — the reference point for every other character in the chart. A person born on a Jia Zi day has Jia wood as their Day Master, sitting on the 子 (water) branch.
Personality
You think in long arcs. The wood wants to grow straight and useful, while the Rat beneath brings quiet resourcefulness and a private inner life. You are patient, self-directed, and rarely show the full plan.
Work and vocation
Best when you own a problem rather than follow a script. Research, writing, product design, teaching, or starting something from scratch suits a slow-building temperament.
Relationships
Warm but reserved. You attach through shared projects more than constant contact, and you need a partner who respects your need to retreat and think.
Health and rhythm
A cold, damp constitution. Keep the lower back and kidneys warm, and break up long sedentary stretches.
Upcoming 甲子 days
The sexagenary day cycle repeats every sixty days. These are the next dates that fall on Jia Zi.
- 2026-12-16
- 2027-02-14
- 2027-04-15
- 2027-06-14
- 2027-08-13
- 2027-10-12
Is this your day pillar?
You do not need to know your day pillar in advance. Enter your birth date, time and place, and the calculator works out all four pillars — then shows how your Day Master reads against the rest of the chart.
Cast your free BaZi chartOther Jia days
All six Jia pillars share the same Day Master. For the stem on its own — its nature, strengths and blind spots — read the Jia Day Master guide.
This page is a study aid for classical BaZi symbolism, not a prediction. It describes tendencies and temperaments, not events, outcomes or dates. For medical, legal or financial decisions, consult a qualified professional.