Data coverage

Every row keys to a single date dimension spanning 1900–2100 (73,414 days). On that spine:

Layer	What’s on it
Calendars	Gregorian, Chinese/Vietnamese lunar years, Hebrew, Persian (Nowruz), Vedic samvatsara, Mayan Long Count
Sky	Moon phases, seasons (solstice/equinox anchors), planetary retrogrades and sign ingresses
Cards	Cardology birth cards, karma/planetary spreads, tarot, full compatibility connection system
Numbers	Numerology systems, gematria ciphers, life-path math
Signs & symbols	Tropical + sidereal zodiacs (13-sign true sidereal included), Chinese zodiac, I Ching, runes, ogham, geomancy

How sky dates are calculated: moon, season, and planetary event anchors are computed offline with the standard Swiss Ephemeris Python stack — the same widely used astronomical library many production astrology and astronomy systems rely on — then stored and served as lookups. There is no live ephemeris at request time on the published spine. All of it: pre-computed, lowercase-normalized, served as structured JSON. Full payload: these docs summarize coverage. For every field the tools return, call a tool — the live JSON is the complete payload (no separate full_payload flag).

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Tools

Reference

Data coverage

Data coverage

​Data coverage

Data coverage