Month and Day Pillars in Liu Yao
Liu Yao month and day pillars add cast-time context for line strength, clashes, combinations and void; their calculation policy must be stated and replayable.
Overview
Month branch and day stem-branch are time-dependent chart inputs, not birth-chart substitutions. In the current OpenFate contract, the month pillar follows exact solar-term boundaries and the civil day rolls at 23:00 under the selected timezone; other schools or products may declare a different day boundary.
At a glance
- Reader question
- month and day pillars in liu yao
- Evidence model
- Fixed chart facts → attributed tradition → conditional interpretation
- Product boundary
- OpenFate /liuyao owns interactive casting and chart generation
- Review posture
- Source-backed reference · interpretation remains conditional
Direct answer
Month branch and day stem-branch are time-dependent chart inputs, not birth-chart substitutions. In the current OpenFate contract, the month pillar follows exact solar-term boundaries and the civil day rolls at 23:00 under the selected timezone; other schools or products may declare a different day boundary.
Definitions and prerequisites
Preserve the UTC instant, displayed civil time, timezone offset and calendar policy. Near a solar term or 23:00 boundary, compare the exact instant rather than copying a date label from another calculator.
Method or reference rule
Calculate the month and day under the declared policy, retain both full pillars and their branches, derive the day-stem-dependent Six Spirits and ten-day void, then evaluate line interactions without erasing contrary factors.
Worked example
Two casts ten minutes apart can use different day pillars if they straddle the declared 23:00 boundary. The six tossed values may be identical while day-dependent Six Spirits, void and interaction evidence differ.
Closest failure case
Comparing an OpenFate chart with a midnight-boundary chart and calling one wrong before aligning settings is invalid. So is using the querent’s birth month instead of the cast-time month.
Sources, interpretation and limits
Month/day calculations are reproducible within a stated convention. Their presence does not establish causation or a guaranteed date, and a time-based label must not replace real deadlines, records or professional advice.
Historical and academic records support the named chart taxonomy. Exact table output here follows the versioned OpenFate product contract and is not presented as universal school agreement.
Verification checklist
Save the question, cast time, timezone, face convention, six line values, source edition and product version whenever they can change the result.
- Reproduce the six stored line values before interpretation.
- Name the method, edition and product settings used.
- Cite the decisive chart facts instead of one dramatic label.
- Use observable records and qualified advice for high-stakes decisions.
Sources and editorial basis
- Chinese Text Project: 京氏易傳京氏易傳 work record and visible organization; exact rule claims require a separately named volume, passage and edition. Page claim scope: 記錄月令、日辰、節氣換月與日界線的產品政策，不與出生命盤混用。Digitized historical work associated with Eight-Palace, Shi–Ying, Najia and kinship vocabulary. Exact doctrinal claims still require a named volume, passage and edition.
- A Study on the Construction and Application of Jing Fang YiThesis record T14175802, abstract and contents headings for Eight Palaces, Shi/Ying, Najia/Nazhi and Six Relations; taxonomy only. Page claim scope: 記錄月令、日辰、節氣換月與日界線的產品政策，不與出生命盤混用。Academic thesis record connecting Jing Fang Yi with later Six-Line studies; the accessible contents list Eight Palaces, Shi–Ying, Najia/Nazhi and Six Relations. The record supports taxonomy, not unseen page-level arguments.
- OpenFate Liu Yao deterministic chart contractOpenFate app/modules/liuyao/logic/engine.ts: solar-term exact month pillar, current 23:00 civil-day boundary and declared timezone handling.Product evidence for seeded six-line casting and the current deterministic chart fields and policies. It supports current behavior only, not historical priority or predictive truth.