Monthly Influence in Bazi
Calculate the monthly stem-branch by solar-term boundaries, layer it under the annual influence, and keep short-term interpretation conditional.
Overview
A Monthly Influence is a dated stem-branch layer derived from the Bazi solar-month system. The month branch changes at the relevant sectional solar term, not automatically on the first Gregorian or lunar day, and the month stem is derived from the annual stem under the declared year convention. It can refine annual and Luck-Pillar analysis, but it does not rewrite the natal Month Pillar or guarantee a monthly event.
At a glance
- Symbol
- Monthly stem-branch
- Boundary
- Sectional solar term
- Stem rule
- Derived from annual stem
- Longer layers
- Natal chart, Luck Pillar, annual influence
- Purpose
- Monthly refinement
- Boundary
- Does not replace natal Month Pillar
Calculate the solar month before interpretation
Resolve the instant against the relevant sectional solar-term boundary and assign the correct month branch.
Derive the month stem from the applicable annual stem and preserve the complete monthly Jiazi with timezone and calculation version.
- Do not use calendar-month shortcuts.
- Store the exact boundary timestamp.
Keep the natal and timed months separate
The natal Month Pillar remains fixed because it belongs to the birth chart; the Monthly Influence is a temporary layer.
Label every relation by source so users can distinguish natal month, active annual influence, and the shorter monthly Jiazi.
- Never overwrite the natal month.
- Display layer provenance.
Use the month to refine an existing timing hypothesis
Compare the monthly stem and branch with the natal chart, active Luck Pillar, and annual Jiazi after those longer layers are established.
Look for repeated or completing evidence and state when the monthly interval starts and ends rather than treating the month name as a result.
- Read longer layers first.
- Attach claims to the month interval.
Monthly influence is not a scheduling guarantee
It cannot guarantee interviews, conception, profit, conflict, treatment outcomes, accidents, or any other event in a month.
Use practical calendars, consent, medical advice, contracts, and risk planning for time-sensitive decisions.
- Avoid event-day promises.
- Do not delay necessary action.
Sources and editorial basis
- 《淵海子平》 (Yuanhai Ziping)《淵海子平》五虎遁與月建法以年干配月干、節令定月支，八字流月不能用國曆或農曆初一直接代替A foundational Ziping reference for branch months, hidden stems, roots, and stem-branch relationships.
- 《三命通會》 (Sanming Tonghui)《三命通會》月令與節氣諸論支持以節令時刻分月，並將流月作後來時間層而非出生月柱A historical compilation covering stems and branches, Ten Gods, Nayin, Shen Sha, and multiple classical pattern systems.
- OpenFate Editorial Methodology流月頁保存節令時間、時區、完整月柱及來源層，限定為歲運細化並排除月內事件與排程保證OpenFate separates deterministic chart calculation, traditional interpretation, and modern editorial explanation.