BaZi · Day Master
The Ding day master (丁, dīng)
Ding is Yin Fire: a lamp, a candle, the small flame that is carried and sheltered.
Element: Fire · Polarity: Yin · Pinyin: dīng · Read as: a lamp, a candle, forge fire
As a day master
A Ding day master is read as warm and precise, and hard to estimate from outside. It lights a room rather than a field, and it is at its best where attention is being paid.
What classically stands beside it
The classical line feeds Ding with 甲 (Yang Wood, its Direct Resource) and gives it 庚 for the wick; a lamp without fuel is only a flare.
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 Ding day master mean I am Fire?
It says the day stem is Fire; 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 · 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