BaZi day master · 3 of 10

Yang Fire Day Master (丙火) in BaZi

丙 is yang fire — the sun. It is the most outwardly visible of the ten stems: light that falls on everything rather than on one chosen thing. If your day pillar begins with 丙, this is the character the rest of your chart is measured against.

The short version

丙 is fire without an aim — light cast on everything at once.

The sun image cuts both ways in classical practice: reach and consistency come with the fact that nothing is singled out.

Is your day master 丙?

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Enter your birth date — nothing else is required for this answer. If the result comes back with a different stem, the profile for it is one click away at the bottom of the page.

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How it’s calculated

  1. 1

    Take the day pillar

    The day pillar advances exactly one step per calendar day with no gaps and no leap corrections. That continuous count is what makes it reliable: it does not depend on the calendar reform, the timezone or the season.

  2. 2

    Read its heavenly stem

    The stem of that pair is the day master. 丙 is the 3rd of the ten stems, so “is my day master 丙?” reduces to one question about one character — and it can be answered from the date alone.

  3. 3

    Set it as the reference

    Once 丙 is fixed, the other seven characters stop being a list and become relationships. Every stem in the chart is named by how it stands to 丙 — that is the table on this page, and it is different for each of the ten stems.

The full rule set — every convention, in order, with the engine field names — is published on the methodology page.

What 丙 means as a day master

丙 is fire at yang: the sun, the large flame, daylight itself. Where the other nine stems can be read as a thing with a boundary, 丙 is read as an emission — it is defined by what it reaches rather than by what it is. Classical texts pair it with visibility: reputations, public roles, warmth that arrives without being asked for.

丁 is its counterpart and the contrast is instructive. 丁 is the lamp or the candle: fire with an intention, pointed at one thing. 丙 has no target. The practical reading is that 丙 charts are read for range and presence, and for the corresponding difficulty — the sun does not get to be selective about what it illuminates.

The ten gods, read from 丙

The ten gods are not ten things — they are five relations, each of which comes in two polarities, and the relation is always measured from the day master. With 丙 as the reference the five relations resolve as follows: 火 itself is the Peer, Wood generates 火 and is the Resource, Earth is what 火 produces and is the Output, Metal is what 火 controls and is the Wealth, and Water is what controls 火 and is the Officer.

The table below is produced by the engine from that rule alone — the element relation, multiplied by whether the two stems share a polarity. Nothing in it is memorised and nothing in it is interpreted. This is the reason a chart can be re-read by anyone: change the day master and all ten names change at once, in a way that is checkable rather than a matter of opinion. On the chart in the worked example below, 丙 is the day stem itself, so the four visible stems around it each carry one of these names.

What feeds 丙, and what spends it

A chart is not read by counting elements — it is read by what each element does to the day master. Wood (甲 乙) generates 火, so it is the Resource: what supplies 丙 without being asked. 丙 丁 is the Peer. Earth (戊 己) is what 火 produces, so it is the Output: energy that leaves as work, expression or craft. Metal (庚 辛) is what 火 controls, so it is the Wealth. Water (壬 癸) is what controls 火, so it is the Officer — the element that acts on 丙 and therefore carries the chart's pressure.

Five relations doubled by polarity gives the ten gods, and that is the whole structure. What it does not give you is a verdict on whether 丙 has enough support, because that judgement depends on how much you weight the month of birth, whether hidden stems count fully, and whether rootedness outranks raw count — and three competent practitioners can disagree. So we print the counts and the support/drain split, and leave the weighing to the reading rather than hiding a weighting model inside a score.

Where 丙 turns up in the branches

丙 appears inside two branches: 巳, where it is the primary hidden stem, and 寅, where it is a secondary one. So yang fire can be present in a chart that never shows a 丙 on the surface — worth knowing, because the branch it hides in also carries wood, which is what produces it.

This matters more than it sounds. Four of the eight characters in a chart are branches, and each branch conceals between one and three stems, so a chart can hold 火 energy in a form that never appears on the surface. The list below is generated from the same fixed hidden-stem table the calculator uses — you can check it branch by branch.

The common misreading

The sun image gets read as "extrovert", which is too narrow and too personal. 丙 is a statement about visibility, not about temperament: it describes a chart whose energies are read in public terms. A 丙 day master can be withdrawn — what the stem actually predicts is that things tend to become visible, whether or not the person wants them to.

A worked example

Every page on this site that needs a worked example uses the same approach: a real birth moment, run through the engine at build time, with the numbers printed so you can reproduce them. This page's example is 31 January 1990, Taipei.

Input

Date
31 January 1990
Time
10:00
Place
Taipei, Taiwan
Time zone
Asia/Taipei

Nearest 节

Next: 立春1990-02-04 · 10:14

Year pillar 己巳 — this date is before 立春, which is what sets it.

丙Bǐng

Day master of this chart

丙 — Yang Fire

Day pillar 丙申 · 纳音 山下火 · image the sun

All four pillars, computed at build timeyear · month · day · hour

  • Year 年

    己巳

    大林木

  • Month 月

    丁丑

    涧下水

  • Day 日

    丙申

    山下火

  • Hour 时

    癸巳

    长流水

  • Woodabsent
  • Fireself450%
  • Earth225%
  • Metal113%
  • Water113%
Supports the day master 4Draws on it 4

Surface tally 8 of 8 — and no Wood at all. Support 4, drain 4, counted across the four stems and four branches and not weighted by season. A single absent element is a fact about this one chart, not a verdict on it.

Ten consecutive days, ten day masters

31 January 1990 gives 己巳 丁丑 丙申 癸巳 — the day pillar is 丙申, so the day master is 丙. It belongs to a run of ten consecutive dates, 30 January to 8 February 1990, which produce all ten day masters exactly once, because the day pillar advances one step per calendar day and ten steps cycle through all ten stems. That same run straddles the exact minute 立春 fell in 1990 (4 February, 10:14 local), so the earlier dates sit in the 己巳 year and the later ones in the 庚午 year — which also flips the luck-pillar direction, since direction follows the year stem's polarity. On this chart the surface tally is Wood 0 · Fire 4 · Earth 2 · Metal 1 · Water 1 — support 4, drain 4, and the luck pillars run backward from 丙子.

Engine v1.1.0 · lunar-javascript@1.7.7 · these four pillars and this tally reproduce exactly from the input above, in your browser or ours.

The full stem map, computed

These ten names are not a list to memorise — they are computed by one rule: the element relation between the two stems, multiplied by whether their polarities match. The table is produced by the engine from that rule, and it changes completely the moment the day master changes away from 丙.

Peer

Same element as the day master

  • 丙比肩 · Companion
  • 丁劫财 · Rob Wealth

Output

What the day master produces

  • 戊食神 · Eating God
  • 己伤官 · Hurting Officer

Wealth

What the day master controls

  • 庚偏财 · Indirect Wealth
  • 辛正财 · Direct Wealth

Officer

What controls the day master

  • 壬七杀 · Seven Killings
  • 癸正官 · Direct Officer

Resource

What produces the day master

  • 甲偏印 · Indirect Seal
  • 乙正印 · Direct Seal

丙 against itself is a Peer of the same polarity, so it is always Companion 比肩. The other nine stems divide across the five relations with two in each — which is why there are exactly ten names and never eleven.

The hidden-stem table, filtered to 丙

A stem does not have to appear on the surface of a chart to be present — every branch carries one to three hidden stems, and this is where the engine finds them. The list below is generated from the same fixed table the calculator uses.

  • 寅Tiger · Yínsecondary hidden stem
  • 巳Snake · Sìprimary hidden stem

巳 carry it as the primary hidden stem; 寅 carry it as a lesser one. A lesser position is not a weaker claim on the element — position matters for weighting, and weighting is the step where published schools disagree.

The other nine day masters

Each stem has its own page, and they are read against each other rather than in isolation — 甲 against 乙, 丙 against 丁. Whichever one is yours, the comparison is usually where the meaning is.

Questions

What does a Yang Fire day master mean?
丙 is fire at the yang pole: the sun rather than the lamp. The chart is read for reach and visibility first — what does this energy fall on, and what does it cost to be seen. It is a classical image of a starting material, not a description of an individual.
What is the difference between 丙 and 丁?
Direction. 丁 is fire with a target — the lamp, the candle, attention concentrated on one thing. 丙 is fire with no target — the sun, which lights everything in range. Same element, opposite polarity, and the two are read as different kinds of energy rather than different amounts.
Is 丙 always a good thing to have in a chart?
Not in itself. Classical practice treats fire in a chart the way it treats any other element: it depends on the season and on the day master. A summer 丙 chart and a winter 丙 chart are not read alike, and a site that tells you an element is simply "good" or "bad" has skipped the part that matters.
Where does 丙 appear if it is not the day master?
As a stem in any of the other three pillars, or hidden inside 巳 and 寅. When it is not the day master it is named by its relationship to the day master instead — a 丙 seen from 甲 is an Eating God, from 庚 it is Seven Killings. Our ten gods calculator names it for your own chart.

Full chart

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BaziPattern provides AI-generated readings for entertainment and cultural exploration purposes only. Readings are not predictions, or medical, legal, or financial advice.