Sukuyo birth mansion vs day mansion: what each date means
Sukuyo birth mansion vs day mansion compares two dates: the birthday sets the natal reference, while the target date sets the day mansion.
Overview
Label both dates and both mansion references before interpreting a personal day role. Birth identity and calendar activity are different subjects.
At a glance
- Birth reference
- Birth date
- Day reference
- Target civil date
- Relative label
- Target position from the natal reference
Two dates, two jobs
The birth calculation establishes a stable reference under a stated convention. A daily calculation concerns a different date.
A calendar may display both together, but their roles do not become interchangeable.
Birth descriptions
The natal passages discuss people assigned a mansion in the tradition. They are not daily weather-like forecasts.
A person does not acquire a new birth identity each time the calendar changes.
Day activities
The day passages discuss activities associated with dates. Keep their historical context and do not convert them into occupational or moral judgments.
A day theme can be used as a reflection prompt without claiming that an event will occur.
Relative day labels
Once both reference positions are known, the three-nine sequence describes the target position relative to the birth mansion.
The same target mansion can therefore receive a different relative label for two people.
Reading a screenshot correctly
Look for birth date, target date, absolute mansion and relative label. Ask for the missing field instead of guessing.
If a tool displays only a natal profile, do not present it as a full personalized calendar.
Worked field example
Suppose a display shows birth mansion A, target-day mansion B and the relative role “榮.” A is the stable reference, B belongs to that date and 榮 is the ordered A→B lookup.
Changing only the target date may change B and the role, but it does not recalculate the person into a new birth mansion.
Sources and editorial basis
- 宿曜經 · T1299 卷上卷上「宿曜曆經序日宿直所生品第二」: distinguish 此宿直日 activity from 此宿生人 natal statements.Historical text for mansion names and calendar tables. Its table is not identical to OpenFate’s modern 27-mansion lookup; it does not establish predictive validity.
- OpenFate Sukuyo calculator and calculation conventionEditorial code check 2026-09-10, policy 1.0.0: natal-vs-day; policy.ts, constants.ts, engine.ts and traditional-cycles.ts. Product settings are not an independent historical authority; practical examples are OpenFate editorial applications.Product-specific input and output reference. Editorial checks also inspected policy 1.0.0 and the month-start constants on 2026-09-10; those implementation checks are not an independent traditional authority.