BaZi Yearbook

02 / BASIC CONCEPTS

Start with the symbols

Read the four pairs, find the Day Master, then look up the relationships. These definitions describe a traditional cultural system. They do not establish personality, health or future events.

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Read a checked, fictional example

The site's teaching example uses 18 April 2001 at 12:18 in Los Angeles. Its solar-time estimate is 11:25 under the disclosed method. The four pairs below match the current calculation engine; they are not a reading for a real person.

Four pairs, each with a stem and a branch
PositionPairStemBranch
Year辛巳辛巳
Month壬辰壬辰
Day辛亥辛亥
Hour甲午甲午

The Day Pillar's first character is 辛, so the Day Master is Xin Metal. Birth time and calendar conventions matter near boundaries; accurate-looking characters do not remove uncertain inputs. See the complete verification record

The basic glossary

Four Pillars

Four pairs of characters correspond to the birth year, month, day and hour under a stated calendar rule. Each pair has one Heavenly Stem and one Earthly Branch.

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Heavenly Stems

The ten stems run from Jia (甲) to Gui (癸). Five traditional elements each appear in a yin and a yang form. Look up the character before attaching an interpretation.

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Earthly Branches

The twelve branches run from Zi (子) to Hai (亥). They label calendar cycles and traditional two-hour intervals. Animal names are a memory aid, not a complete chart.

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Day Master

The stem of the Day Pillar is the chart's relationship reference. In the example below, the day pair is Xin-Hai (辛亥), so its Day Master is Xin Metal (辛金).

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Hidden Stems

Each branch is assigned one or more stems in a traditional lookup table. Hidden stems are additional chart symbols, not hidden events or a psychological finding.

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Five Elements

Wood, Fire, Earth, Metal and Water form the traditional production and control cycles. The site's element bars use fixed rule weights, not health measurements or percentages of fate.

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Ten Gods

Ten Gods compare another stem with the Day Master using element relationship and yin/yang polarity. The same stem can receive a different label when the reference changes.

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60 Jiazi Cycle

Ten stems and twelve branches advance together and return to the same pair after sixty steps. Jia-Zi (甲子) begins the sequence; Gui-Hai (癸亥) completes it.

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Luck and Annual Pillars

The natal chart comes from the birth record. A Luck Pillar represents a convention-based longer period; an annual pillar labels a selected year. Different time layers should be read separately.

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Keep calculation and interpretation separate

Calendar labels can be checked against recorded inputs and an explicit method. A traditional interpretation is a different step and cannot replace evidence or qualified advice for important decisions.

Calculation method and limits · Sources · All reference pages