The Day Master in a BaZi Chart
Updated October 26, 2026
The Day Master (日主) is the Heavenly Stem of the day pillar. In BaZi it represents the person themselves: their core element, their way of acting and what they rely on. Every other character is read in relation to it — through the Ten Gods, the element balance and the periods, so every reading starts here.
Ten stems, ten images
The classical tradition describes each stem through an image from nature. An image is not a verdict or a personality type, just a short way to convey an element's character in its polarity.
| Stem | Element | Image |
|---|---|---|
| 甲 Jia | Yang Wood | a great tree, a pine: growing straight upward, a support for others, the stubbornness of a trunk |
| 乙 Yi | Yin Wood | grass, a vine, a flower: flexibility, a knack for going around obstacles, growth through connections |
| 丙 Bing | Yang Fire | the sun: shines broadly and on everyone at once, visible from afar, openness and generosity |
| 丁 Ding | Yin Fire | a candle flame, a hearth fire: focused light, warmth up close, attention to detail |
| 戊 Wu | Yang Earth | a mountain, a rock: stability, reliability, slow decisions, shelter for others |
| 己 Ji | Yin Earth | fertile soil, a field, a garden: nourishes and grows, practicality, care |
| 庚 Geng | Yang Metal | an axe, ore, raw metal: decisiveness, directness, tempered by hardship |
| 辛 Xin | Yin Metal | precious metal, jewellery: refinement, value, sensitivity to appraisal |
| 壬 Ren | Yang Water | the sea, a great river: scope, movement, a mind that never stands still |
| 癸 Gui | Yin Water | rain, dew, mist: quiet penetration, intuition, influence without noise |
Each stem has its own detailed page — seasons, strength, favourable elements, work and relationships; the links are in the first column of the table.
Yang stems are usually described as more direct and outwardly visible, Yin stems as more flexible and subtle. But this is a difference in manner, not in strength: the "small" candle flame 丁 can be very strong in its own chart, while the "sun" 丙 can be weak.
Day Master strength
The same element fares differently in different charts. Wood born in spring, when trees are growing, is in its season of strength; Wood born in autumn is not. That is why the strength of the Day Master is assessed for every chart. In the Bazi.uz methodology this is a simplified points-based rule with four parts:
- Season — the main factor. The month branch either supports the Day Master's element (the "prosperous" and "birth" phases), is neutral, or weakens it.
- Support — how many stems and branch main qi in the chart belong to the same element or to the element that produces it (the resource).
- Drain — how many elements the Day Master produces or controls, or that control it.
- Roots — whether the Day Master's element appears among the Hidden Stems of the branches. A rooted stem is more stable.
The result is one of three categories: leaning strong, leaning weak or close to balanced. The numbers are deliberately not shown on screen: this is a category for interpretation, not a measurement. In borderline cases schools genuinely differ, and a Bazi.uz reading says so explicitly.
Day Master:甲Jia, Yang WoodStrength: leaning weak
In the example the Day Master is 甲 (Jia, Yang Wood), the "great tree". It is born in the 巳 month (Si, Fire) — a season that drains Wood, so the Day Master is assessed as leaning weak.
Favourable elements
The favourable elements are derived from the Day Master's strength — the elements that help the chart come into balance:
- A weak Day Master benefits from the resource (the element that produces it) and its own element.
- A strong one benefits from whatever channels its energy: self-expression (the element it produces), wealth (the element it controls) and authority (the element that controls it); priority goes to whichever is scarcer in the chart.
- One close to balance benefits from the two scarcest elements in the chart: the principle of making up for what is missing.
In a reading, the favourable elements are translated into practical terms: which work rhythm, which kinds of tasks and which environment usually come more easily. Read more about the elements in The Five Elements in a Chart.
Yang and Yin: what is the difference
The five pairs of stems differ in polarity. The Yang stems — 甲, 丙, 戊, 庚, 壬 — act more directly and visibly in classical descriptions: the tree grows upward, the sun shines on everyone, the mountain stays where it is, ore is tempered in fire, the river cuts its channel. The Yin stems — 乙, 丁, 己, 辛, 癸 — act through flexibility and precision: the vine winds around a support, the candle lights a particular table, the garden needs tending, jewellery is valued for its finish, rain seeps in unnoticed. Polarity also affects the Ten Gods: the same element produces different relationships depending on whether its polarity matches that of the Day Master.
The Day Master and the Ten Gods
Every other stem in the chart — visible or hidden — stands in one of ten relationships to the Day Master: the same element, the producing element, the produced element, the controlling element or the controlled element, and in each case of the same or the opposite polarity. These relationships are called the Ten Gods: Friend and Rob Wealth, Eating God and Hurting Officer, Indirect Wealth and Direct Wealth, Seven Killings and Direct Officer, Indirect Resource and Direct Resource. The table and the meaning of each are in the article on the Ten Gods.
How to read your own Day Master
- Find the stem in your day pillar and its image in the table above.
- Look at the season: the branch of the month pillar and its element.
- Look at the strength category and the favourable elements on the chart screen.
- Note which of the Ten Gods stand in the month and hour pillars — this is the Day Master's immediate surroundings.
The image sets the tone, the strength sets the measure, and the favourable elements set the direction. Together they give a first, already meaningful description of the chart.
Common mistakes in reading
Confusing strength with quality. A "strong" or "weak" Day Master is not a judgement of the person. Weak Wood surrounded by Fire can be very productive, because its energy easily finds an outlet; strong Metal without direction can stagnate. The strength category only hints at what the chart needs to reach balance.
Reading only the image. The stem's image sets the tone, but without the season and the surroundings it is too general. Two people with a 丙 Day Master — one born in summer, the other in winter — will be described very differently.
Taking a favourable element literally. Useful Water does not mean living by the sea. In a reading, the elements are translated into types of tasks and environments: for Water these are, for example, analysis, learning, a flexible rhythm and the exchange of information.
Looking for the Day Master in the year pillar. In some popular systems the year of birth is treated as the main sign. In BaZi the reference point is the day stem, while the year describes the external context.