Yi-Si Day Pillar: Yi Wood over Si Fire, Spouse Palace Hurting Officer
What are Yi-Si people like? With Yi Wood as your Day Master, you are like flowering plants and climbing vines: gentle and soft on the surface, yet extraordinarily resilient underneath. Your day branch holds Hurting Officer, so you are quick, expressive and dislike being boxed in by rules. In our sample of 280 Yi-Si charts, 74.3% are weak, so most of these Day Masters lean weak and work well with support. Below: personality first, then love and how the pillar reads for women and men.
The day pillar is the closest of the four to you: the stem is you (the Day Master) and the branch is your spouse palace. The Yi-Si pillar is therefore about the relationship between "Yi Wood the person" and "Si the partner".
- Day Master
- Yi Wood
- Spouse palace
- Si（Fire）
- Palace star
- Hurting Officer
- Na Yin
- Sheltered Lamp Fire
- Void
- Yin, Mao
- Zodiac
- Snake
What Yi-Si people are like
The Day Master Yi Wood sets the base tone: With Yi Wood as your Day Master, you are like flowering plants and climbing vines: gentle and soft on the surface, yet extraordinarily resilient underneath. You are gifted at reading a room and understanding what makes people tick, and you can adjust the way you carry yourself to fit any situation, which lets you move through relationships like a fish through water. You do not go in for head-on confrontation; instead you know how to flow with the current and borrow the strength around you.
The day branch Si has Hurting Officer as its main qi, and that is the layer Yi-Si adds on top of the Day Master: Sitting on the Hurting Officer star makes for a fast mind, sharp observation and a sharp tongue, and it is hard for these people to keep quiet about what they find wrong. The strength is ideas and persuasion. Watch for bluntness and mood swings that offend without meaning to; softening the delivery lets the talent land.
Women and men: traditionally a woman's chart reads the husband star (the Officers) and a man's the wife star (Wealth). For a Yi-Si woman, the husband star Direct Officer is hidden in the spouse palace as its residual qi, so love tends to ripen later; for a Yi-Si man, the wife star Direct Wealth is hidden in the spouse palace as its middle qi, so the bond needs time and care to surface. This only describes what tends to show up in relationships; see "The spouse star of Yi-Si for men and women" below.
Personality is read from the whole chart; the day pillar is only its core. Two people with the same pillar can come across very differently once the month and the other pillars are added.
Which day pillar is yours? Find my day pillar with a free chart →
What is the structure of Yi-Si?
Yi-Si is the stem Yi over the branch Si. Yi is Yin Wood and is your Day Master, standing for you; Si is Fire and sits in the day branch, which is the spouse palace. The relation between the two therefore says two things at once: the grain of the person, and their default position inside an intimate relationship.
Hidden stems and Ten Gods: where the real weight sits
Each branch holds stems that are not written on the face of the chart, yet they decide how much each Ten God actually weighs. Si holds 丙, 戊, 庚, which to the Day Master Yi Wood are:
The main qi carries the most weight, so the spouse palace of Yi-Si mainly shows the face of Hurting Officer; the middle and residual stems are undertones that surface when a Luck Pillar or annual pillar stirs them.
How the stem and branch of Yi-Si relate: stem feeds branch
| Stem | Yi (Wood) |
|---|---|
| Main hidden stem of the branch | Bing (Fire) |
| Stem–branch relation | stem feeds branch |
| Life Stage on its own branch | Bath |
| Root | none (Si holds Bing, Wu, Geng) |
The stem element Wood produces the branch element Fire, so energy flows downward and the Day Master sits on an Output star. These people give, express and make things; they are full of ideas and look after others, but their energy drains easily and they often think of themselves only after everyone else is done.
Yi sitting on Si: the "Bath" stage and the root
Bath, the classical "peach-blossom ground", is a baby’s first wash: sensitive, fond of beauty, curious and charming, with more visible ups and downs of mood.
The Life Stages describe the state of momentum; this site judges a strong or weak Day Master by hidden-stem roots, not by the stages. See the full cycle of every stem on Twelve Life Stages.
From our engine: how strong Yi-Si Day Masters tend to be
| Sample | 280 charts (one per day, 1960–2005; 16,802 in all) |
|---|---|
| Strong / balanced / weak | 3.9% / 21.8% / 74.3% |
| Judged a Follow structure | 0.7% |
| Average strong share, six Yi Wood pillars | 15.6%; Yi-Si runs 11.7 points lower — the Si branch tends to drain the Day Master |
| Most common first useful element | Water 88.6%, Wood 4.3% |
The day pillar is one pillar of four; a person’s strength still depends on the month and the whole chart. These figures show which way sitting on Si pushes the Day Master. Method on Strong and Weak Day Masters.
Spouse palace in Si: partner tendencies and how to get on
The partner：The partner is clever and articulate, conscious of image, quick to think and careful to calculate, and very capable in public. Si is Yin Fire: it burns inside, so the outside can look composed.
Where to put the effort：Saving face comes first; undercutting them in front of others does far more damage than you would expect. They persuade with reasons, so answering only with emotion will not connect. Translate the feeling into a reason they can follow.
Worth saying plainly: the spouse palace describes a tendency, not who a person is bound to meet. It reads more like a map of the routes you take easily inside a relationship; knowing it saves a few wrong turns.
The spouse star of Yi-Si for men and women
Traditionally a man’s wife star is Wealth and a woman’s husband star is Officer or Seven Killings; the question is whether that star sits inside the spouse palace (the day branch). For Yi-Si:
| Place in Si | Reading | |
|---|---|---|
| Male chart (wife star: Wealth) | middle stem, Direct Wealth | the wife star Direct Wealth is hidden in the middle stem of Si: present but not prominent, so the bond tends to surface with time and care. |
| Female chart (husband star: Officer) | residual stem, Direct Officer | the husband star Direct Officer is hidden in the residual stem of Si: the bond matures later, or the partner’s qualities show only after time together. |
Many modern readers look at the spouse palace as a whole regardless of gender; the spouse star is one angle and should be read with the full chart.
Years that touch the Si spouse palace, 2026–2037
The day branch is the spouse palace. When a year’s branch clashes, combines, punishes or harms it, matters of love and home are more easily stirred. The next twelve years:
| Clash | 2031 Xin-Hai |
|---|---|
| Six Harmony | 2028 Wu-Shen |
| Three Harmony | 2029 Ji-You, 2033 Gui-Chou |
| Punishment | 2028 Wu-Shen, 2034 Jia-Yin |
| Harm | 2034 Jia-Yin |
Heaven strikes, earth clashes: in 2031 (Xin-Hai) the year stem Xin attacks the Day Master Yi while the branch Hai clashes Si — a once-in-sixty-years year of upheaval for this pillar.
Hidden echo (fu yin): 2085 is a Yi-Si year again, identical to the day pillar; classical texts read it as repetition and old matters returning.
A year is only a trigger; good or bad depends on the luck cycle and the whole chart, so no single year decides anything. Zodiac-by-zodiac clashes are on Tai Sui.
Special structures in Yi-Si
Ten Evils Great Defeat
The classical view：Classically called Ten Evils Great Defeat, a frightening name for what is simply the Day Master’s prosperity star falling into the void.
In plain terms：The name comes from old date-selection practice and originally meant "the income that should be there is voided": money comes in and goes out rather than accumulating. It is not a verdict that a life is doomed to fail.
Proportion：This is the single most misleading name among all the symbolic stars. In practice, if the chart itself is strong and the Luck Pillar cooperates, the effect is slight. Seeing it is no cause for alarm. Read the whole chart, as always.
Na Yin: Sheltered Lamp Fire
Sheltered Lamp Fire: light held in a golden cup, brilliance breathed from a jade stand.
The small flame sheltered within a lamp, steady and bright, lighting the way by night. Warm and finely attuned, it can guide people through the dark; what matters is keeping this lamp from being troubled by the wind.
Each Na Yin is shared by two pillars: Yi-Si shares Sheltered Lamp Fire with Jia-Chen. It is a supporting layer of imagery, useful for overall flavor, but it does not override the main line set by the Day Master and the spouse palace.
Void branches: Yin, Mao
Yi-Si belongs to the Jia-Chen decade, which never reaches the branches Yin, Mao; these are its void branches. Whatever a voided pillar stands for tends to be "present but not solid": not absent, but hard to hold, or late in arriving. In practice it matters which pillar is voided and whether it is clashed or combined; the fact alone settles nothing.
When Yi-Si days and years come round
| Yi-Si days in 2027 | Jan 26, Mar 27, May 26, Jul 25, Sep 23, Nov 22 |
|---|---|
| Years with Yi-Si as year pillar | 1965, 2025 |
A day pillar returns every 60 days; the year pillar changes at Li Chun, around 4 February. To pick a Yi-Si day for an event, check it on Date Selection.
Famous people with the Yi-Si day pillar
No one in our celebrity series has the Yi-Si day pillar yet; those with the same Yi Wood Day Master are:
Which day pillar is yours?
The day pillar is set by your birth day. Enter your birth date, solar or lunar, and get your Four Pillars chart free in 30 seconds: your day pillar, your spouse palace, and the full spread of Ten Gods.
Yi-Si day pillar FAQ
What is the personality of the Yi-Si day pillar?
The Day Master Yi Wood is the subject: With Yi Wood as your Day Master, you are like flowering plants and climbing vines: gentle and soft on the surface, yet extraordinarily resilient underneath. The day branch Si is the spouse palace and stands as Hurting Officer to the Day Master, adding a second layer. Personality is read from the whole chart; the day pillar is only its most central part.
What kind of partner does the Yi-Si day pillar suggest?
The partner is clever and articulate, conscious of image, quick to think and careful to calculate, and very capable in public. Si is Yin Fire: it burns inside, so the outside can look composed.
Is the Yi-Si day pillar good or bad?
No day pillar is inherently good or bad. The spouse palace star of Yi-Si is Hurting Officer, which names a pattern of relating, not a score. What actually decides how smoothly things run is the balance of the whole chart and the Luck Pillar, not one pillar.
What are the void branches of Yi-Si?
Yi-Si belongs to the Jia-Chen decade, so its void branches are Yin, Mao. Which pillar the void lands on, and whether it is stirred by a clash or combination, is what matters; the bare fact decides nothing.