Ding 丁, the Yin Fire Day Master

Lamplight and starlight

三命通會 gives 丁 two homes: the stars in the sky and the lamp on the ground (三命通會, vol. 2). The lamp comes with a detail. 丁 is lit by 乙, the way people burn vegetable and sesame oil in lamps, oil being “the fat of 乙 wood.” The stars come with a timetable: 丁 likes night and autumn, when starlight is clearest, and fades when the sun comes up.

Korean teaching draws the same picture: 정화 is a small fire like a candle, or a star or the moon, which can’t light up everything the way the sun does but becomes a thread of light in the dark (정해 만세력 lecture 05). The temperament readers draw from the lamp is attentive and warm at close range: good with one person, one task or one idea at a time, and more persistent than it looks. Readers often picture it in work that rewards close attention, like editing, research, craft or one-to-one care, and in friendship keeping a small circle for a long time.

丁火柔中: soft outside, bright within

滴天髓’s verse for 丁 begins 丁火柔中，內性昭融: yin fire is soft and centered, and bright and clear inside (滴天髓, 天干論). The commentary explains the paradox. Fire is fierce by nature, but 丁 is yin, so it is gentle on the outside and refined within. A later line promises steadiness either way: 旺而不烈，衰而不窮, strong, it doesn’t rage; weak, it doesn’t run out.

That line is the most useful thing the tradition says about 丁 in practice. A 丁 Day Master tends not to swing to extremes: when things go well it doesn’t burn the house down, and when they go badly it keeps a small flame going. Its risk is the reverse of 丙’s. Not glare, but staying so contained that nobody knows the lamp is on.

The family in the verse: ten gods for 丁

The rest of the verse speaks in family roles, and they line up with the ten gods our engine computes. The verse has 丁 embracing 乙 (抱乙), and the commentary calls 乙 丁’s mother: 乙 is your Indirect Resource. 如有嫡母，可秋可冬: with a “proper mother,” 丁 gets through autumn and winter, and the commentary names what makes that possible, a single 甲, your Direct Resource. 合壬而忠: 丁 combines with 壬, which the commentary calls its ruler, and 壬 is your Direct Officer (滴天髓, 天干論).

So the old family picture and the modern names agree: resource is the parent, officer the one you answer to. The table fills in the other roles; each name has its own entry on the ten gods.

How 丁 tends to meet each element

Beyond the family roles, 三命通會 has practical notes on how 丁 burns, and each one translates into a habit readers recognize.

• Wood is fuel, and the warning is about wet wood. 三命通會 says dry wood, even a little, is enough to kindle 丁, while damp wood, even a lot, can’t make it bright. For a person, quality of support matters more than quantity: one good mentor does more for 丁 than a crowd of advisers.
• Metal is work to do: 庚 and 辛 are 丁’s Direct Wealth and Indirect Wealth. In its season, the book says, 丁 can work even dull, stubborn metal; out of season it can’t manage even a sliver. Timing, in other words: 丁 gets a great deal done when the moment is right and very little when forced.
• Earth is output, 戊 as Hurting Officer and 己 as Eating God. In the generating cycle fire makes earth, and earth holds warmth after the flame has moved on. That is why readers link 丁 with work that keeps giving off heat later: writing, teaching, a well-made thing.
• Water rules it. Besides 壬, 癸 is 丁’s Seven Killings, the sharper pressure, and the obvious image is a lamp in the rain. 丁 tends to answer pressure better with a place to shelter the flame, a routine or a person, than by trying to match it.
• Other fire: 丙 is 丁’s Rob Wealth. The sun and the lamp share an element and very little else.

The six 丁 day pillars, dusk to dawn

三命通會 times 丁 by the night sky: it is born at 酉, the evening hour when lamps are lit and stars come out, and it dies at 寅, dawn, when the sun rises and the stars fade (三命通會, vol. 2). Our twelve-stage table follows that rule, so 丁酉 Fire Rooster holds 丁 at 長生 (starting fresh). The other five are 丁巳 Fire Snake (帝旺), 丁未 Fire Goat (冠帯), 丁卯 Fire Rabbit (病), 丁丑 Fire Ox (墓) and 丁亥 Fire Pig (胎).

寅, the branch of 丁’s “death,” isn’t among the six. 丁 is yin and 寅 is yang, and stems only pair with branches of the same polarity, so there is no 丁寅 day at all. The stage names are a lamp’s timetable, not a verdict on anyone’s birthday.

2027 (丁未): a year of your own stem

Fire’s color in the Korean scheme is red, so 丁未, 정미년 in Korean, is the year of the Red Sheep, 붉은 양 (색, E0027476). For a 丁 Day Master it is also a year of your own stem: 丁 is your Friend, the Goat’s main stem 己 your Eating God, and the branch also hides 丁 again and 乙, your Indirect Resource. 丁’s twelve stage in 未 is 冠帯 (wanting to look right).

With your own stem overhead and Eating God in the branch, the habit the year tends to test is the 冠帯 one: wanting everything to look right before anyone sees it. The reflection for a lamp is to finish the thing you’ve been polishing and let it be seen before it looks perfect. This is a mirror, not a forecast. 丁未 Fire Goat has the pillar itself, and the 2027 page the other Day Masters.

About this page

Written with AI (Claude) from the sources listed and our calculation engine. Horan and Kachi are fictional characters, and nothing here predicts events. The rules behind every chart: how we calculate.