Day Pillars › Ding Si
Ding Si 丁巳 Day Pillar · Jeongsa
Ding Si places the candle flame on the Snake, a branch of early-summer Fire. It is one of the most concentrated Fire pillars in the sixty-day cycle.
- Day Master (stem)
- 丁 Ding · Yin Fire
- Spouse palace (branch)
- 巳 Si · Fire Snake
- Hidden stems
- 戊 Wu (Hurting Officer) · 庚 Geng (Direct Wealth) · 丙 Bing (Rob Wealth)
- Twelve stage
- 帝旺 · 제왕 Peak
- Na Yin
- 沙中土 Sand Earth
- Void (공망)
- 子丑 Rat and Ox
- Image
- Paper lanterns glowing on a summer night
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What is the Ding Si (丁巳) day pillar like?
Ding is Yin Fire: candlelight, a lamp, a focused flame that shows the way in the dark. 巳, the Snake, is early-summer Fire, so stem and branch share an element and reinforce each other. The main hidden stem, 丙 Bing, is a Rob Wealth, the blazing sun beside the candle, both companion and rival. 庚 Geng sits inside as Direct Wealth, a practical stake in tangible results. 戊 Wu adds a Hurting Officer, bold expression and a talent for challenging the usual way. The pillar burns with focus, ambition and expressive heat.
Korean readers call this pillar 정사 (Jeongsa) and imagine lanterns glowing along a street on a warm summer night. Each light is small, yet together they change the whole scene. Jeongsa people are intense, perceptive and quick to sense what others feel. They can be gentle one moment and fiercely determined the next. Passion fuels their work, and they hold strong views on fairness. When something matters to them, they commit fully. Learning when to dim the flame a little helps them save warmth for what counts most.
What does the twelve-stage position mean for Ding Si?
Ding on 巳 is at 帝旺 (제왕, jewang), the Peak stage, the high point of the twelve-stage cycle. For Jeongsa this reads as concentrated strength: confidence, conviction and the energy to carry a project from idea to completion. The classic counsel for Peak energy is to give it a worthy direction.
What is the Na Yin of Ding Si?
丁巳 carries 沙中土, Sand Earth, like 丙辰 before it. Sun-warmed sand holds heat long after sunset. As a poetic note for Jeongsa, it hints at warmth that lingers, a presence people remember after the evening ends.
How does Ding Si approach close relationships?
Ding Si's day branch, the spouse palace or 배우자궁 (baeujagung), holds 丙 as its main hidden stem, a Rob Wealth for this Day Master. In partnership this suggests a bond between peers who are both bright and strong-willed, like two flames side by side. Jeongsa enjoys a partner with equal energy and passions of their own. Shared projects and friendly competition keep things lively. The key is turning rivalry into teamwork: agreeing on roles and celebrating each other's wins makes the shared light brighter instead of dimmer.
How does Ding Si work best?
Jeongsa thrives where focus and passion are assets. Research, writing, performance, design, advocacy, technical crafts and specialist consulting suit its concentrated fire. The Hurting Officer helps them innovate and speak up; the Direct Wealth keeps attention on concrete outcomes. They work well with clear goals and enough autonomy to pursue them intensely, and they appreciate colleagues who match their commitment.
What are the strengths and blind spots of Ding Si?
- Focused intensity — Jeongsa can pour full attention into a single task until the finished work truly shines.
- Perceptiveness — like candlelight in a dark room, they reveal the small details others overlook.
- Conviction — strong values give them the courage to speak up for what feels fair.
Things to watch
- Running too hot — pacing commitments keeps passion bright over the long term instead of flaring briefly.
- Rivalry with peers — framing competition as shared motivation prevents friction with equally strong colleagues.
- Blunt challenges — pairing a critique with a suggestion helps the Hurting Officer's insight get heard.
Which day pillars are related to Ding Si?
Same Day Master: 丁卯 Ding Mao, 丁丑 Ding Chou, 丁亥 Ding Hai, 丁酉 Ding You, 丁未 Ding Wei.
Heaven-and-earth combination (천지합): 壬申 Ren Shen — its stem combines with 丁 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 Jeongsa (정사) mean in Korean Saju?
정사 (Jeongsa) is the Korean name for 丁巳, the 54th pillar of the sixty-day cycle. 정 (Jeong) is Yin Fire, a candle or lamp, and 사 (Sa) is the Snake, a Fire branch of early summer. Doubling Fire gives a focused, passionate and perceptive nature. Korean readers picture glowing lanterns on a summer night: small lights that transform a whole street.
Is Ding Si a strong day pillar?
Ding Si is well supported at its root. The Snake is Fire, the Day Master sits at the Peak stage, and the branch's main hidden stem is a fellow Fire. For that reason readers see the pillar itself as strong. The month and other characters still matter; plenty of Water or Earth elsewhere can bring the heat into balance.
What is the void (공망) of the Ding Si day pillar?
Ding Si sits in the 甲寅 decade, so its 공망 (gongmang) branches are 子 (Rat) and 丑 (Ox). Void simply names the branches that fall outside the decade's pairing. Readers note where 子 or 丑 appear in the chart and interpret those areas as less emphasized. It adds nuance to a reading and carries no fixed outcome.
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.