Ding Si · 丁巳
Ding Si pairs a Yin Fire Day Master with 巳 (the Snake), a Fire branch. If this is your day pillar, the pairing below describes tendencies worth observing — not a verdict.
The Day Master on top
Yin Fire · 丁 — The classical image for 丁 is a lamp or candle flame: heat gathered to a point, lighting a chosen circle. A Yin Fire Day Master tends to warm specifically — one person, one problem, one room at a time — and to notice what broad light washes out.
Read the full profile →The branch beneath — your spouse palace
In a day pillar, the branch is read as the spouse palace: the texture of close partnership. 巳 (the Snake) carries these hidden stems, each read as a relationship between that stem and your Day Master:
丙
Rival Wealth
Opposite polarity, same element — close competition, shared resources, sharp give-and-take.
庚
Direct Wealth
Direct wealth — steady earnings, tangible assets, and accountable exchange.
戊
Output (Sharp)
Sharp output — wit, critique, and originality that can cut as well as create.
Na Yin
The Na Yin of Ding Si is 沙中土 — "Earth in the Sand". Na Yin is a poetic sixty-fold naming of the pillars, used as a secondary texture rather than a primary verdict.
Stage of the cycle
Peak — Peak force — maximum expression of the Day Master in this branch.
Void branches (Xun Kong)
Charts anchored on 丁巳 treat 子丑 as "void" — branches whose signals are read as weakened or delayed rather than absent.
Is Ding Si actually your day pillar?
The day pillar comes from your exact birth date — and near midnight, from true solar time. Calculate it instead of guessing.
As with everything on Truenoon, this page describes observable tendencies, not a verdict on who you are.