Day pillar type
Blue Pig (Yi Hai): Personality and Matches
Hongsimdang Editorial Team · Last updated
Blue Pig (Yi Hai) is the day pillar where flowers and vines that bend with the wind (乙) rests on great water in winter (亥). In short, it turns learning and backing into strength and grows from the roots up.
What decides the Blue Pig: day stem and day branch
Your day pillar is the stem and branch of the day you were born: the upper character is the day stem and the lower one is the day branch. For Blue Pig (Yi Hai), the day stem is 乙 (Yin Wood) and the day branch is 亥 (Pig). The “Blue” in the name is the color of the day stem’s element, and “Pig” is the zodiac animal of the day branch. Both are Hongsimdang’s own labels.
The day stem 乙 is likened to flowers and vines that bend with the wind. You adjust to your surroundings so smoothly that by the time anyone notices, your roots are already deep. The day branch 亥 is great water in winter. The Pig is popularly pictured as big-hearted, curious and deeply feeling, but that is the folk image of the zodiac. The actual reading comes from the element relationship and life stage that follow.
Read as elements, your stem and branch form a resource pair, in which the branch feeds the stem. The branch’s element flows toward your stem the way soil feeds a plant, so learning and backing turn easily into strength, and you often feel held up from underneath. The branch 亥 also holds the hidden stems 戊, 甲, 壬, which lay another side beneath the one that shows.
Seen from your day stem 乙, the day branch 亥 sits at the Death (Si) stage of the twelve life stages. It is the stage of stopping to think, and your focus on digging into a single matter deepens.
How the Blue Pig shows up at work
Study, credentials and the support of seniors or teachers turn into results for you fairly directly. You tend to wait until you feel prepared, so try putting work out at eighty percent. The gap between you and your peers can open quickly.
You produce your best results when you can immerse yourself in a subject you care about, and your ability to listen makes you the one who eases tension on a team. You fit in so easily that your own standards slide to the bottom of the list, and you rarely say so when you are worn out.
When fatigue or low mood deepens, you sink into your feelings and put off sorting out practical matters.
Before a large expense or a promise, wait a day and talk it over with one outside person before you decide.
How the Blue Pig shows up in relationships and love
You are drawn to people who look after you or guide you, and you are good at receiving. The more comfortable it gets, the easier it is to take that care for granted, so repay it with actions and the relationship will last.
You give generously to people you trust, but once you have fixed on a direction in your mind you tend to run straight ahead and rarely turn back.
A good partner appreciates your generosity and offers a practical view when your assumptions run ahead.
How the Blue Pig handles money
Income comes most easily from knowledge, credentials, contracts or a steady backer, and building up gradually suits you better than speculating. The start may look slow, but once the base is laid you gain ground quickly.
Money grows best for you through connections and small openings picked up one at a time, not through a single all-in bet.
You pour money generously into people and things you love, and you also bring it in, but be careful about putting in everything at once on an assumption you cannot walk back.
Day branches that harmonize with the Blue Pig and ones that clash
The day branch of Blue Pig (Yi Hai) is 亥 (Pig). Which day branch the other person has decides the relation between your two branches, as shown below. A day branch that is not listed has no direct harmony or clash with yours.
| Their day branch | Relation between branches | How it reads |
|---|---|---|
| Rabbit (卯) | Triple Harmony partner | moves in the same direction, and the group is complete once a third branch joins |
| Goat (未) | Triple Harmony partner | moves in the same direction, and the group is complete once a third branch joins |
| Tiger (寅) | Six Harmony, Break | pulls together and fills in; cracks are likely |
| Dragon (辰) | Resentment / Ghost Gate | attracts yet irritates |
| Snake (巳) | Clash | head-on opposition |
| Monkey (申) | Harm | small misunderstandings pile up |
| Pig (亥) | Self-punishment | the same habit amplifies |
Harmony, Clash, Punishment, Harm, Break and Resentment are relations fixed mechanically by the pair of branches. They say nothing about anyone’s character being better or worse.
2027 (Ding Wei year) and the Blue Pig
2027 is a Ding Wei year. The year’s stem and branch change over at the start of spring, around February 4, 2027. The Ding of 2027 is energy that flows out of your day stem naturally, so giving shape step by step to what you like, or letting your expression and making spread gently, is likely this year. The year branch Wei has no direct Six Harmony or Clash with your day branch, so the color of this year shows mainly in its relation to your day stem.
What the day pillar alone cannot tell you
The day pillar is one of the four pillars of a chart. The year, month and hour pillars, the ten-year luck cycles, and Zi Wei Dou Shu and Western astrology readings are not included on this page. Two people with the same Blue Pig can show it differently depending on their other pillars, and your day pillar alone does not settle personality or fate.
To see all four pillars, use the free BaZi calculator. To read a specific question through to timing, a personal reading is the next step.
See the whole chart with the free BaZi calculator →Personal readings →Day Pillar Types →
Frequently asked questions
How do I find out whether I am a Blue Pig?
The day of Blue Pig (Yi Hai) comes around once every 60 days, and people born on a 乙亥 day belong to this type. Enter your birth date on the day pillar type index to check.
Why am I a Blue Pig if my birth-year animal is not the Pig?
The birth-year animal comes from the year branch, while the Pig in Blue Pig comes from the day branch 亥. They are two separate calculations. Even if your birth year belongs to another animal, a day branch of 亥 makes your day pillar a Pig.
Which types match the Blue Pig?
Looking only at day branches, the Six Harmony partner of 亥 is the Tiger (寅), and the clash comes from the Snake (巳). That is one narrow view. How well two people fit depends on all four pillars and on how they treat each other.
See other types
Same color
- Blue Rat (Jia Zi)
- Blue Ox (Yi Chou)
- Blue Dog (Jia Xu)
- Blue Monkey (Jia Shen)
- Blue Rooster (Yi You)
- Blue Horse (Jia Wu)
- Blue Goat (Yi Wei)
- Blue Dragon (Jia Chen)
- Blue Snake (Yi Si)
- Blue Tiger (Jia Yin)
- Blue Rabbit (Yi Mao)
Same animal