Year, Month, Day, and Hour Pillars Overview (年月日時)
Compare the calculation role, classical position, and safe interpretive limits of the Year, Month, Day, and Hour Pillars in one concise guide.
Overview
The four Bazi pillars preserve one birth moment at year, month, day, and two-hour resolutions. The Year Pillar sets the annual pair, the Month Pillar carries the seasonal command, the Day Pillar supplies the Day Master and immediate seat, and the Hour Pillar completes the time-specific pair. Classical palace meanings add context but never prove family biography or life events.
At a glance
- Year Pillar
- Annual stem-branch position
- Month Pillar
- Solar-term month and seasonal command
- Day Pillar
- Day Master and Day Branch seat
- Hour Pillar
- Double-hour branch and derived stem
- Positional use
- Traditional reading context
- Boundary
- No pillar independently determines a life area
Each pillar has its own calculation boundary
The Year Pillar changes at the declared year boundary and the Month Pillar at exact Jie transitions. The Day and Hour Pillars require an explicit day-change and time-zone policy.
Using one calendar label for all four columns can create silent errors. Each pair should retain its own derivation evidence.
- Resolve the instant before all four calculations.
- Expose the boundary used for each pillar.
The four positions contribute different structural evidence
The Day Stem is the relational center, while the Month Branch is the primary seasonal frame. Year and Hour still participate in roots, Ten Gods, combinations, clashes, and patterns.
No column is merely decorative. Whole-chart analysis compares every stem and branch while preserving their positions.
- Keep Day Master and month command distinct.
- Include all pillars in the relation map.
Palace meanings are traditional lenses
Schools associate the pillars with ancestry, parents, self, spouse, children, early context, and later development in different ways.
These associations suggest questions; they do not verify facts about another person or guarantee a life period. State the convention and corroborate it.
- Label the palace framework used.
- Do not infer relatives’ traits from a chart.
Avoid single-pillar readings
A favorable label in one pillar may be weak, obstructed, or structurally unhelpful; a clash in one position may be inactive or redirected.
Interpretation should show season, roots, interactions, timing, and counterevidence before connecting a pillar to lived experience.
- Reject pillar-only fortune rankings.
- Publish conditions and counterevidence.
Sources and editorial basis
- 《三命通會》 (Sanming Tonghui)《三命通會》年月日時諸論：四柱各有位置但必須合參A historical compilation covering stems and branches, Ten Gods, Nayin, Shen Sha, and multiple classical pattern systems.
- 《淵海子平》 (Yuanhai Ziping)《淵海子平》四柱與日主諸論：日干取主不代表其他柱可省略A foundational Ziping reference for branch months, hidden stems, roots, and stem-branch relationships.
- OpenFate Editorial Methodology四柱概覽頁以計算邊界、位置與全局證據取代固定宮位事件配對OpenFate separates deterministic chart calculation, traditional interpretation, and modern editorial explanation.