BaZi · Day Master
The Yi day master (乙, yǐ)
Yi is Yin Wood: grass, a vine, the plant that bends in the wind and comes back.
Element: Wood · Polarity: Yin · Pinyin: yǐ · Read as: grass, a vine, a climbing plant
As a day master
A Yi day master is read as adaptable and persistent. It gets where it is going by route rather than force, and it holds on where a tree would snap.
What classically stands beside it
The classical line brings Yi out with 丙 (Yang Fire, its Eating God) for its bloom, and accepts the same 庚 cut that Jia wants — thin wood is what survives it.
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 Yi day master mean I am Wood?
It says the day stem is Wood; 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 · Bing 丙 · Ding 丁 · Wu 戊 · 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