Your day master is the heavenly stem of your birth day — the character that represents you. It is the single most important piece of a BaZi chart, and the ten are ten genuinely different starting positions rather than ten labels.
A BaZi chart is eight characters: a stem and a branch for the year, the month, the day and the hour. The stem of the day is the day master. Practitioners read it first, because every other character in the chart is defined by its relationship to that one — supporting it, draining it, controlling it or competing with it.
The practical consequence is that the same character means different things in different charts. A wealth star in a Jia chart is not the wealth star in a Bing chart, because the thing being supported, expressed or constrained is a different self. This is the layer above the zodiac animal, and it explains most of why two people born in the same year live nothing alike.
Below are all ten, each with the full reading: what the stem is, how it feels from the inside, where it performs, where it goes wrong, and what balances it.
| Stem | Day Master | Element | Image |
|---|---|---|---|
| 甲 | Jia | Wood · Yang | the tall tree |
| 乙 | Yi | Wood · Yin | the climbing vine |
| 丙 | Bing | Fire · Yang | the sun |
| 丁 | Ding | Fire · Yin | candlelight |
| 戊 | Wu | Earth · Yang | the mountain |
| 己 | Ji | Earth · Yin | the cultivated field |
| 庚 | Geng | Metal · Yang | the blade |
| 辛 | Xin | Metal · Yin | jewellery |
| 壬 | Ren | Water · Yang | the great river |
| 癸 | Gui | Water · Yin | morning dew |
The calculator derives your four pillars from your exact birth data and identifies the day master, every ten god, and your element balance.
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