Your day master

Look at your day pillar — the third of the four. The upper character is your day master, and it represents you.

The other seven characters are the conditions around you: what you inherited, the environment you grew up in, what pressures you, what you can act on. This one is the self they are all acting on.

Ten types, not twelve

Because your day master is one of the ten stems, Saju sorts people into ten types rather than twelve signs. Yang Wood the tree. Yin Wood the vine. Yang Fire the sun. Yin Fire the candle. Yang Earth the mountain. Yin Earth the field. Yang Metal the blade. Yin Metal the jewel. Yang Water the ocean. Yin Water the rain.

These are the images the tradition uses, and they are more useful than they look. A tree and a vine are both Wood, but a tree grows through an obstacle over years while a vine routes around it in a week.

Why everything is measured from here

Every other judgement in a reading is relative to this character. What supports you, what drains you, what a given year does to you — all of it is calculated as a relationship to your day master.

This is also why the birth hour matters so much for accuracy. The day pillar changes at 23:00, not midnight, and a birth near that boundary that is not corrected to true solar time can produce the wrong day master entirely — which changes not one character but the reference point for the whole chart.

What a day master does not tell you

Two people with the same day master born in different seasons read almost nothing alike. Yang Wood born in spring is a tree in growing season. Yang Wood born in deep winter is the same tree, frozen, with no leaves and a very different life.

Your day master is the starting point of a reading. It is never the reading.