Sukuyo seven luminaries and weekdays
Sukuyo seven luminaries are Sun, Moon, Mars, Mercury, Jupiter, Venus, and Saturn, corresponding in order to Sunday through Saturday.
Overview
Record the civil date before matching a luminary to a mansion. A weekday association is not a replacement for the mansion itself.
At a glance
- Cycle
- Seven weekdays
- Symbols
- 日・月・火・水・木・金・土
- Separate field
- Birth-mansion luminary association
Read the weekday sequence
Sunday corresponds to 日, Monday to 月, then 火, 水, 木, 金 and 土 through Saturday.
The classical vocabulary includes historical names for the planets; the weekday sequence is not a seven-mansion roster.
Do not confuse two associations
A chart can display the luminary of a weekday and a separately assigned mansion association.
Check the field label before assuming that two different values indicate an error.
Named combinations need two inputs
For example, the classical 甘露 table pairs Sunday with 軫 and Monday with 畢.
Neither Sunday alone nor 軫 alone establishes the combined label.
Historical rules are not instructions
T1299 includes day-specific ritual and activity judgments. Those record a tradition rather than demonstrate modern safety or efficacy.
Do not use a weekday description to delay care or override practical precautions.
What to record
Keep the exact civil date, weekday and mansion method together when comparing calendars.
A screenshot that omits the target date cannot establish which combination was calculated.
Verify a weekday independently
Use the target civil date and timezone to confirm its weekday before looking at the Sukuyo mansion. Then compare both fields with the named combination table.
If the weekday is wrong, a special-day mismatch begins with ordinary calendar data, not with a hidden change in the seven-luminary sequence.
Sources and editorial basis
- 宿曜經 · T1299 卷下卷下「七曜直日曆品第八」weekday sequence and named combinations.The three-nine passage supplies historical relative-position terminology. It is not evidence that a modern relationship outcome is determined by a mansion pair.
- OpenFate Sukuyo calculator and calculation conventionEditorial code check 2026-09-10, policy 1.0.0: weekdays; 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.