Home › Notes › Day pillars › Sinhae day pillar

Sinhae Day Pillar (辛亥)
— Jewelry Metal, finely crafted metal for adornment

Day pillars · 2026.08.25 · 5 min read

Of the Eight Characters in Saju (四柱, the Four Pillars), the two of the day you were born are called the day pillar (ilju 日柱). It's the pillar that describes you most closely. The Sinhae day pillar is the 48th stem-branch pair of the sixty Gapja (六十甲子). Below, we'll go step by step: the nature of the Day Master and day branch, then the Nayin element (納音五行), Gongmang (空亡, the Void), the Twelve Sinsal (十二神殺, twelve symbolic stars), and the next Sinhae days.

What kind of pairing is the Sinhae day pillar?

Picture a polished gem sitting on the great waters of early winter. Sin Metal (辛金) is the energy of a gem whose refining is complete. It's crafted rather than sharp-edged, so a delicate, keen sensibility is counted as its strength.

Hae Water (亥水) is the seat of great water that takes everything in. It's counted as a seat that is generous and warm-hearted. In Five Elements terms, the Day Master Sin is Metal and the day branch Hae is Water — a shape in which your energy flows down into your seat. If the idea of a day pillar is new to you, it's worth reading that first.

What does the Nayin element Jewelry Metal mean?

It means finely crafted metal for adornment — gold shaped into hairpins and bracelets. It isn't metal as it came out of the ground but metal worked by a craftsperson to be worn, so it's read as an image of delicacy and polish. Because it has become something kept close at all times, it's interpreted as an energy that puts care into the people nearby.

The partner that shares Jewelry Metal is the Gyeongsul day pillar. Of the two, Sinhae is on the yin-stem side, so it's read as refining the same image from within.

How do the Day Master Sin and the day branch Hae relate?

The hidden stems held in Hae, the day branch of the Sinhae day pillar, are Mu, Gap and Im. Matching the main stem Im (壬) against the Day Master Sin, the Ten God of this seat reads as Hurting Officer.

It's an energy you give rise to, but of the opposite polarity, so it's a seat where expression becomes sharper. It's seen as quick-witted and nimble, and as feeling stifled when boxed in. As much as words and ideas shine here, pacing how you express yourself is often named as its task. You can see all ten Ten Gods, from Companion to Direct Resource, in the Ten Gods complete guide.

When is the next Sinhae day?

Since one of the sixty Gapja is attached to each day, a Sinhae day comes around every 60 days. Here are the nearest dates, calculated with the Mutal Unnie Saju engine.

For a Sinhae day pillar, a Sinhae day is when the same stem-branch pair as your day pillar comes back around. Traditionally it's seen as a day when your own energy doubles up, so the ups and downs of your condition tend to show clearly. How each day's stem-branch pair rotates continues in the story of iljin.

What do the Void branches In·Myo mean?

The sixty Gapja are grouped into six decades (sun 旬) of ten, and the Sinhae day pillar belongs to the Gapjin decade, whose Void branches are In·Myo. In (寅) and Myo (卯), two characters of Wood energy, are the empty seats. In effect, the characters of beginnings are left empty, so for fresh starts on days carrying them, the reading is to pause for a beat first.

Being empty doesn't mean bad — it's also interpreted as a seat where attachment has less of a hold. For the full guide to reading the Void, continue with What is Gongmang?

What does the Jisal position mean?

Hae is the birth position (saengji 生地) in the Three Harmony Wood frame (木局) of Hae·Myo·Mi. That's why the day-branch seat of the Sinhae day pillar is read as Jisal in the Twelve Sinsal.

Jisal (地殺, Earth Star) is the star of movement and beginnings. When the character in the birth position (saengji) sits in the day branch, a life on the move is said to suit you. It's a seat where your energy actually comes alive with moving house, travel and new surroundings. The full picture of the twelve sinsal is in the Twelve Sinsal complete guide.

Is the day pillar all I need to look at?

What this note covers is the nature of the day pillar — two of the Eight Characters. Once the other six — your birth year, month and hour — are added, the story changes a great deal. Even with the same Sinhae day pillar, someone born in spring and someone born in autumn are seen as using different strategies. So treat this note only as a starting point, and continue the full picture in the order for reading a birth chart.