Enter your birth date and instantly find your Day Master (Il-gan, 日干) — the single most important element of your Korean Saju chart. Free, instant, no sign-up.
Your Day Master (Il-gan, 日干) is the Heavenly Stem of the day you were born — the one pillar of your Korean Saju chart that represents you yourself. There are exactly ten Day Masters, each pairing one of the Five Elements (Wood, Fire, Earth, Metal, Water) with a yin or yang polarity. Enter your solar birth date below to find yours instantly, free.
From our Saju engine: day pillars are computed from the verified reference day 7 January 2000 = Gap-Ja (sexagenary index 0), reduced modulo 60. Across the full 60-day sexagenary cycle each of the ten Day Masters recurs exactly six times — 6 of every 60 days, or 10%.
The Day Master is who you are — but your full Saju also weighs your year, month and hour pillars, the balance of all Five Elements, and your ten-year luck cycles. CheonMyeongDang reads the whole chart for a personalized analysis.
Get your full Saju reading →Every Day Master is one of the ten Heavenly Stems (天干). Each pairs one of the Five Elements with a yin or yang polarity, and Saju tradition reads it through a natural symbol. This is the full reference the calculator above draws on.
| Day Master | Element | Polarity | Natural symbol | Core nature |
|---|---|---|---|---|
| Gap 甲 갑 | Wood 木 | Yang | The great tree | Upright, principled, growth-driven |
| Eul 乙 을 | Wood 木 | Yin | The vine and flower | Adaptable, gentle, resilient |
| Byeong 丙 병 | Fire 火 | Yang | The sun | Bright, warm, expressive |
| Jeong 丁 정 | Fire 火 | Yin | The candle and lamplight | Thoughtful, devoted, quietly intense |
| Mu 戊 무 | Earth 土 | Yang | The mountain | Steadfast, reliable, broad-minded |
| Gi 己 기 | Earth 土 | Yin | The garden soil | Nurturing, practical, accommodating |
| Gyeong 庚 경 | Metal 金 | Yang | The axe and raw ore | Decisive, courageous, direct |
| Sin 辛 신 | Metal 金 | Yin | The jewel and fine blade | Refined, precise, discerning |
| Im 壬 임 | Water 水 | Yang | The great ocean and river | Resourceful, expansive, free-flowing |
| Gye 癸 계 | Water 水 | Yin | The dew and gentle rain | Intuitive, sensitive, quietly persistent |
Five Elements cycle Wood → Fire → Earth → Metal → Water; each element has a yang stem and a yin stem, giving ten Day Masters in all. The symbols and keynotes describe natural tendencies for reflection, not fixed outcomes.