Day Master is the Heavenly Stem of your day pillar in the Bazi chart — it represents the core of your personality, your fundamental identity, and how you interact with the world. Out of the 10 Heavenly Stems, your Day Master is determined by your birth day and becomes the central point of all Bazi analysis. All other elements in your chart "revolve" around this Day Master.
Don't know your Day Master? Check it instantly at the LumiSaju calculator — you'll see your Day Master and full analysis immediately. If you're new to Bazi, read What Is Bazi? first.
Why Is Day Master So Important?
In a Bazi chart consisting of four pillars (year, month, day, hour), the day pillar is the one that most represents you. The year pillar represents grandparents and childhood, the month pillar represents parents and career, the hour pillar represents children and old age.
But the day pillar — specifically its Heavenly Stem — is you. That is the Day Master (日主, Ri Zhu).
All Bazi analysis starts from the Day Master:
- 10 Gods are calculated based on how other elements relate to the Day Master
- Chart strength is determined by how much support the Day Master receives
- Beneficial elements are chosen based on what the Day Master needs to balance
Without understanding the Day Master, you cannot read a Bazi chart correctly.
The 10 Day Master Types
There are 10 Heavenly Stems, which means there are 10 Day Master types. Each has unique characteristics.
1. Jia (甲) — Yang Wood
Analogy: A big tree, a solid wooden pillar
Jia is a natural leader with big vision. Like a tall tree growing straight up, Jia people have high ambitions, strong principles, and the courage to lead.
- Strengths: Brave, idealistic, responsible, protective
- Challenges: Stubborn, difficulty compromising, sometimes too rigid
- Ideal careers: CEO, activist, architect, educator
2. Yi (乙) — Yin Wood
Analogy: A climbing vine, flowers, grass
Yi is a natural diplomat who is flexible and adaptive. Like a vine that finds its way around obstacles, Yi people are skilled negotiators and adapters.
- Strengths: Flexible, creative, diplomatic, highly empathetic
- Challenges: Can appear weak, too dependent on others, indecisive
- Ideal careers: Designer, counselor, diplomat, writer
3. Bing (丙) — Yang Fire
Analogy: The sun
Bing is charisma in human form. Like the sun, Bing people radiate warmth and energy that attracts everyone. They are generous, optimistic, and hard to ignore.
- Strengths: Charismatic, generous, optimistic, inspirational
- Challenges: Needs attention, can be arrogant, impatient
- Ideal careers: Public speaker, entertainer, marketing director, chef
4. Ding (丁) — Yin Fire
Analogy: A candle, a star
Ding is light in the darkness. Not as bright as the sun, but precisely because of that, Ding people have more depth and intimacy. They are intuitive, romantic, and possess inner wisdom.
- Strengths: Intuitive, warm, spiritual, detail-oriented
- Challenges: Too sensitive, moody, can be manipulative
- Ideal careers: Psychologist, researcher, writer, artist, spiritual healer
5. Wu (戊) — Yang Earth
Analogy: A mountain, a great wall
Wu is strength and stability. Like a mountain that doesn't move, Wu people are reliable, protective, and have a calming aura. They become the foundation for people around them.
- Strengths: Stable, trustworthy, protective, patient
- Challenges: Stubborn, slow to adapt, too conservative
- Ideal careers: Manager, real estate developer, banker, mediator
6. Ji (己) — Yin Earth
Analogy: Garden soil, fertile earth
Ji is a natural nurturer and manager. Like garden soil that nourishes plants, Ji people are skilled at managing resources, caring for relationships, and creating productive environments.
- Strengths: Nurturing, detail-oriented, adaptive, practical
- Challenges: Overthinking, excessive worry, can be possessive
- Ideal careers: HR manager, accountant, consultant, farmer, caregiver
7. Geng (庚) — Yang Metal
Analogy: A sword, an axe, iron
Geng is a fighter and reformer. Like a sharp sword, Geng people are decisive, brave, and not afraid of conflict. They believe in justice and have steel-like determination.
- Strengths: Brave, decisive, loyal, has strong sense of justice
- Challenges: Too blunt, confrontational, difficulty showing emotions
- Ideal careers: Lawyer, surgeon, military, engineer, reformer
8. Xin (辛) — Yin Metal
Analogy: Jewelry, gold, gems
Xin is beauty and precision. Like jewelry carved with detail, Xin people have high taste, are perfectionists, and appreciate quality. They are elegant but can be sharp.
- Strengths: Elegant, perfectionist, intelligent, has good taste
- Challenges: Too critical, sensitive to criticism, can be arrogant
- Ideal careers: Fashion designer, jeweler, financial analyst, auditor, beauty industry
9. Ren (壬) — Yang Water
Analogy: The ocean, a great river
Ren is an adventurer and visionary. Like the vast ocean, Ren people have big ambitions, adventurous spirit, and extraordinary adaptability. They are always moving and seeking new horizons.
- Strengths: Ambitious, adaptive, intelligent, adventurous
- Challenges: Restless, difficulty committing, can be manipulative
- Ideal careers: Entrepreneur, traveler, trader, diplomat, tech innovator
10. Gui (癸) — Yin Water
Analogy: Dew, rain, tears
Gui is intuition and depth. Like calm, mysterious dew, Gui people have high emotional sensitivity, ability to read people, and wisdom that comes from depth.
- Strengths: Intuitive, empathetic, wise, has healing ability
- Challenges: Moody, too passive, can get trapped in emotions
- Ideal careers: Psychologist, data analyst, researcher, healer, writer
Strong vs Weak Day Master
Knowing your Day Master type is not enough — you also need to know whether your Day Master is strong or weak. This determines which elements benefit or harm you.
Strong Day Master
A Day Master is considered strong when many elements in the chart support it — the same element and the element that "gives birth to it" (according to the productive cycle).
Characteristics of a strong Day Master:
- Confident, independent, has strong drive
- Can be stubborn and resistant to help
- Needs elements that "control" or "drain" for balance
Weak Day Master
A Day Master is considered weak when there is little support in the chart — more elements that control or drain it.
Characteristics of a weak Day Master:
- More adaptive, cooperative, needs support
- Can lack confidence or be too dependent on others
- Needs supporting or same-type elements for balance
Important: Weak does not mean bad, and strong does not mean good. What matters is balance. A weak Day Master that receives the right support from Luck Pillars can be very successful.
Day Master and Relationship Compatibility
Day Master also plays an important role in determining relationship compatibility. Some Day Master combinations are naturally harmonious:
- Jia (Yang Wood) + Ji (Yin Earth) — a classic strong combination
- Bing (Yang Fire) + Xin (Yin Metal) — melting and forming together
- Ren (Yang Water) + Ding (Yin Fire) — dynamic balance
Check your Day Master's compatibility with your partner on the Compatibility page.
How to Find Your Day Master
Calculating Day Master manually requires the Wan Nian Li calendar and True Solar Time correction — the process is quite complex (read full details in How to Calculate Bazi).
The easiest way is to use an automatic calculator. LumiSaju not only displays your Day Master but also provides complete analysis including chart strength, 10 Gods, and personal recommendations — plus insights from Korean Saju, Nine Star Ki, Numerology, and Western Astrology.