BaZi · Day Master
The Gui day master (癸, guǐ)
Gui is Yin Water: dew, rain, a spring that seeps rather than runs.
Element: Water · Polarity: Yin · Pinyin: guǐ · Read as: dew, rain, a spring
As a day master
A Gui day master is read as subtle, receptive and quietly persistent. It gets in everywhere without noise, and it works by wearing through rather than breaking in.
What classically stands beside it
The classical line shelters Gui under 辛 (Yin Metal, its Direct Resource) and lets 丙 (Yang Fire) warm it; a spring wants shade, and it also wants some light.
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 Gui day master mean I am Water?
It says the day stem is Water; 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 · Wu 戊 · Ji 己 · Geng 庚 · Xin 辛 · Ren 壬
Cast your chart All ten Day Masters Luck Pillars (大运) — the ten-year blocks of a BaZi chart