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Gyeongjin Day Pillar (庚辰)
— White Wax Metal, metal that still gleams soft

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 Gyeongjin day pillar is the 17th 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 Gyeongjin days.

What kind of pairing is the Gyeongjin day pillar?

Picture hard iron sitting on moist spring soil. Gyeong Metal (庚金) is an energy as decisive as autumn frost. Its strength is the resolve to clear away what needs clearing.

Jin Earth (辰土) is the soil of the pond where dragons are said to live. It holds a lot, so its inner world is complex — but it's said to be a seat of equally great possibility. In Five Elements terms, the Day Master Gyeong is Metal and the day branch Jin is Earth — a shape in which your seat supports you. If the idea of a day pillar is new to you, it's worth reading that first.

What does the Nayin element White Wax Metal mean?

It means metal that still gleams soft — metal in a state as soft as beeswax. Its refining isn't finished, so it's still soft, but that's exactly why it's read as an image of potential that could take any shape. It's metal that grows harder the more it's tempered by fire, so it's counted as a Nayin with plenty of room to grow.

The partner that shares White Wax Metal is the Sinsa day pillar. Of the two, Gyeongjin has a yang stem, so even with the same image its energy is read as showing on the outside.

How do the Day Master Gyeong and the day branch Jin relate?

Inside the day branch are hidden Heavenly Stems called hidden stems (jijanggan 支藏干). Jin's hidden stems are Eul, Gye and Mu, and its representative character (main stem) is Mu (戊). Read through the eyes of the Day Master Gyeong, this becomes Indirect Resource.

You sit on an energy that helps you, but in a slightly unconventional way. It's seen as a seat where intuition and ideas develop, and where study off the beaten path suits you. On days when your mind gets busy, moving your body is said to be the best remedy. What each of the ten Ten Gods means is in the Ten Gods complete guide.

When is the next Gyeongjin day?

A Gyeongjin day comes around once every 60 days. Here are the nearest Gyeongjin days, calculated with the Mutal Unnie Saju engine.

A day carrying the same stem-branch pair as your day pillar is seen as a day when your own energy doubles up. If you jot down how you felt on days like these, your rhythm starts to show. How the daily stem-branch pairs rotate is explained in the story of iljin.

What does Gongmang Sin and Yu mean?

The Void is set by the group (decade, sun 旬) a day pillar belongs to. The Gyeongjin day pillar belongs to the Gapsul decade, so its Void branches are Sin·Yu. Sin (申) and Yu (酉), two characters of Metal energy, are the empty seats. On days when these characters arrive, it's said to help if you loosen your grip on results a little.

Gongmang isn't something to fear; it's closer to a marker telling you where to ease off. How Gongmang works across the whole birth chart is described in detail in Gongmang explained.

What does the Hwagaesal position mean?

Jin is the storage position (goji 庫地) in the Three Harmony Water frame (水局) of Sin·Ja·Jin. That's why the day-branch seat of the Gyeongjin day pillar is read as Hwagaesal in the Twelve Sinsal.

Hwagaesal (華蓋殺, Canopy Star) is the star of the canopy. As the storage-position character that gathers in what has spread out and tucks it away inside, it's interpreted as shining in deep study or creative work. The full picture of the twelve sinsal is in the Twelve Sinsal complete guide.

Is the day pillar all I need to look at?

A day pillar reading is the entrance to Saju, not the conclusion. Once the month branch, hour pillar and 10-year luck cycles are layered onto the two characters of the Gyeongjin day pillar, the same day pillar branches off in tens of thousands of directions. If the traits described here don't quite fit, there's a good chance the other six characters are telling a different story. The order for reading the whole chart is in the complete guide to reading Saju.