BaZi · Day Master
The Wu day master (戊, wù)
Wu is Yang Earth: a mountain, a wall, ground that does not move on its own.
Element: Earth · Polarity: Yang · Pinyin: wù · Read as: a mountain, a wall
As a day master
A Wu day master is read as stable, containing and slow to change. It holds whatever is built on it, and it does not negotiate with the weather.
What classically stands beside it
The classical line loosens Wu with 甲 (Yang Wood, its Seven Killings) and drains it with 壬 (Yang Water, its Indirect Wealth): a mountain that is never opened is also a mountain nothing comes out of.
Where it sits in a chart
The Day Master is whatever stem the day pillar lands on; a chart can carry the same stem in the year, month or hour pillar, and that is then read as another character standing to the Day Master, not as a second day master.
Where this stem comes from
The day is counted in an unbroken sixty-day cycle, so the stem is not chosen — it is the one the cycle lands on. Enter a birth date and the chart prints it.
Questions
How is the day pillar computed?
Days are counted in a cycle of sixty, unbroken since the calendar began, so a given date always falls on the same stem and branch. Only the hour pillar needs the birth hour.
Does a Wu day master mean I am Earth?
It says the day stem is Earth; the chart counts all eight characters. The Day Master is the reference point, not the whole of the reading.
All ten Day Masters
Jia 甲 · Yi 乙 · Bing 丙 · Ding 丁 · Ji 己 · Geng 庚 · Xin 辛 · Ren 壬 · Gui 癸
Cast your chart All ten Day Masters Luck Pillars (大运) — the ten-year blocks of a BaZi chart