Gui Hai 癸亥
Black Pig · A great river flowing into the sea
Yin Water — morning dew. Your day branch carries the same water energy as your Day Master — you are seated on your own root.
The summit of the cycle. The most command and the strongest will — which also means the direction it points matters more than usual.
A competitive sibling sits in the inner room. Drive and nerve run higher; sharing what is yours comes as the accompanying lesson.
The stems concealed inside 亥 (Pig). A branch is not one single energy — it holds this mixture, in these proportions across a 30-day month.
A great river flowing into the sea — the last of the sixty, and the largest movement of water in it. The breadth of thought and imagination means it could go anywhere, which is exactly why a direction, a set of banks, makes this life more comfortable.
Save the Black Pig card to PinterestFrequently asked
How do I know if I have the Gui Hai day pillar?
Your day pillar is the stem-branch pair governing the day you were born — Gui Hai (癸亥) in this case. It rotates every day through a cycle of sixty, and the boundaries depend on solar terms and the 11pm zi-hour rule, so it is not something you can count by eye. Enter your birth date in our free reading and the engine computes it directly.
What is the Gui Hai day pillar like?
Black Pig — the image traditionally attached to it is "A great river flowing into the sea". Your Day Master 癸 (Yin Water — morning dew) sits on 亥, the Pig, which carries Water. In the twelve-stage cycle that position reads as Peak, and the seated Ten God is Rival.
Does my day pillar tell me my whole chart?
No. The day pillar is two characters out of eight — your core axis, not the whole picture. The year, month and hour pillars, the balance of the five elements, and your decade luck all have to be laid on top before a reading means much. Treat a day-pillar page as the doorway, not the room.
Why is it called Jia Zi in Chinese and something else in Korean?
Same sixty-cycle, different reading of the same characters. 癸亥 is romanised Gui Hai from Mandarin and gyehae from Korean, and Korean saju calls the day pillar ilju (일주). The calculation is identical; the interpretive traditions differ.
Other pillars with the same Day Master (癸)
Other pillars seated on the Pig (亥)
The twelve-stage position, seated Ten God and hidden stems are computed by the Ioreum deterministic engine (ruleset ioreum-2026.07). The reading itself is interpretation from the day-pillar tradition, not verified science — we always tell you which part is calculation and which part is tradition.