Day Pillars › Yi Si
Yi Si 乙巳 Day Pillar · Eulsa
Yi Si sends a flowering vine up the Fire Snake's sunlit wall, a pillar of charm, presentation and early-summer brightness.
- Day Master (stem)
- 乙 Yi · Yin Wood
- Spouse palace (branch)
- 巳 Si · Fire Snake
- Hidden stems
- 戊 Wu (Direct Wealth) · 庚 Geng (Direct Officer) · 丙 Bing (Hurting Officer)
- Twelve stage
- 沐浴 · 목욕 Bathing
- Na Yin
- 覆燈火 Lamp Fire
- Void (공망)
- 寅卯 Tiger and Rabbit
- Image
- Flowering vines on a sunlit wall
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What is the Yi Si (乙巳) day pillar like?
Yi Si pairs Yin Wood, the flowering vine, with 巳 (Si), the Snake, a Fire branch where early summer heat rises. Wood feeds Fire, so this pillar's energy blooms outward into charm, style and expression. The main hidden stem, 丙 (Bing), is the Hurting Officer: a bright, persuasive talent that likes to stand out and improve on convention. 庚 (Geng) adds the Direct Officer, a sense of order and reputation. 戊 (Wu) contributes Direct Wealth, a practical streak that keeps creative flair organized and useful.
Korean readers know this 일주 (ilju, day pillar) as 을사 (Eulsa) and imagine flowering vines climbing a sunlit wall at the start of summer. People with this day pillar are described as charming, perceptive and quick, with a talent for presentation and an eye for what makes things attractive. They read a room easily and adapt their style to it. Korean readings mention that flowers in strong sun need water: Eulsa does well to balance its sparkle with study, reflection and supportive friendships that keep it grounded.
What does the twelve-stage position mean for Yi Si?
Yi in the Snake is at 沐浴 (목욕, mogyok), Bathing, on the twelve-stage cycle, the stage when a newborn is first washed and begins to discover the world. It is read as curiosity, sensitivity to beauty and a wish to experiment. For Eulsa this suggests charm, adaptability and a fresh, exploratory approach to life.
What is the Na Yin of Yi Si?
Yi Si shares the Na Yin 覆燈火, Lamp Fire, with Jia Chen. Here the lamp sits among summer flowers at dusk, a poetic color of warmth, ambiance and gentle light that draws people in.
How does Yi Si approach close relationships?
The spouse palace, 배우자궁 (baeujagung), of Yi Si holds 丙 as its main hidden stem, the Hurting Officer for a Yi Day Master. Close partnership is colored by lively communication, romance and a strong wish for self-expression within the relationship. Eulsa enjoys a partner who appreciates its creativity and keeps conversation engaging. Alongside it, the Direct Officer stem lends a sense of loyalty and public respect. Because expression runs strong, the bond grows when both people speak openly but kindly, and when appreciation is voiced as readily as opinions.
How does Yi Si work best?
Yi Si fits fields where presentation and people skills count. Marketing, branding, public relations, fashion, beauty, performance, sales, hospitality and diplomacy suit its persuasive charm. The Hurting Officer brings original ideas; the Direct Officer adds professionalism; Direct Wealth keeps projects practical. Eulsa likes visible results and appreciation for good work. It shines in roles where creativity is welcomed and a polished image matters.
What are the strengths and blind spots of Yi Si?
- Persuasive charm — Eulsa presents ideas attractively and wins people over with warmth and style.
- Social intelligence — it reads moods quickly and adapts its approach to suit each person or setting.
- Creative polish — the Hurting Officer and Direct Officer combine originality with a professional finish.
Things to watch
- Burning bright too long — balancing busy social stretches with restful evenings helps preserve Eulsa's sparkle.
- Sharp wit in debates — choosing gentle phrasing keeps clever comments from stinging the people it cares about.
- Chasing applause — measuring success by its own standards keeps this pillar steady when praise is slow.
Which day pillars are related to Yi Si?
Same Day Master: 乙丑 Yi Chou, 乙亥 Yi Hai, 乙酉 Yi You, 乙未 Yi Wei, 乙卯 Yi Mao.
Heaven-and-earth combination (천지합): 庚申 Geng Shen — its stem combines with 乙 and its branch forms a six-harmony pair with 巳, a pairing traditionally read as easy rapport. Compare two real charts on the compatibility page.
What does Eulsa (을사) mean in Korean Saju?
을사 (Eulsa) is the Korean reading of 乙巳, the 42nd pair in the sixty-day cycle. 을 (Eul) is Yin Wood, a vine or flower, and 사 (Sa) is the Snake, a Fire branch of early summer. As a day pillar it pictures flowering vines in warm sunlight, a charming, perceptive and expressive self.
Is Yi Si a strong day pillar?
Yi Si is generally considered lightly rooted, because the Snake branch holds Fire, Metal and Earth with no Wood or Water stem. The vine's energy flows outward into expression. Water and Wood elsewhere in the chart, or a spring or winter birth, supply support. Balance, not raw strength, is what a Saju reader looks for.
What is the void (공망) of the Yi Si day pillar?
Yi Si's 공망 (gongmang) branches are 寅 (Tiger) and 卯 (Rabbit), the void pair for the ten pillars that begin with 甲辰. Interestingly, both are Wood branches, the Day Master's own element. Readers interpret a void as a softer, less fixed area of the chart, one that responds to patient effort, and they read it together with every other factor.
For entertainment and self-reflection only. Saju describes tendencies, not fixed outcomes, and nothing here is professional advice. Twelve stages, Na Yin and void branches follow standard Korean and Chinese almanac tables (checked against the independent library lunar-python); background: Sexagenary cycle (Wikipedia). Updated October 7, 2026.