Geng Zi (庚子) — Yang Metal on the Rat
A blade cooled in dark water.
- Heavenly stem
- 庚 · Geng · Yang Metal
- Earthly branch
- 子 · Zi · Rat
- Na Yin
- Earth on the Wall
- Hidden stems
- Gui
- Hidden gods
- Hurting Officer
- Branch element
- Water
Sharp metal resting in cold water, quiet and exact.
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 Geng Zi day has Geng metal as their Day Master, sitting on the 子 (water) branch.
Personality
Geng metal is decisive; the Rat underneath makes it calculating and private. You are sharp, self-contained and rarely surprised, because you tend to have already modelled the awkward outcomes. People find you calm rather than warm, and they are not wrong.
Work and vocation
Engineering, finance, security, or research — precision and discretion, where not saying everything is a professional virtue.
Relationships
Loyal but reserved, and easy to misread as indifferent. Verbal warmth costs you nothing and changes how everything else lands.
Health and rhythm
Kidneys, lower back and cold. Solitude restores you, but prolonged isolation and cold weather drain you faster than you notice.
Upcoming 庚子 days
The sexagenary day cycle repeats every sixty days. These are the next dates that fall on Geng Zi.
- 2026-11-22
- 2027-01-21
- 2027-03-22
- 2027-05-21
- 2027-07-20
- 2027-09-18
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 Geng days
All six Geng pillars share the same Day Master. For the stem on its own — its nature, strengths and blind spots — read the Geng 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.