calendar

Wheel of the Year — True Astronomical Dates

Returns the 8 Wheel of the Year events (4 cross-quarters + 4 cardinal points) calculated using true apparent solar longitude from JPL DE440. Cross-quarter dates are the true midpoints between solstices and equinoxes, NOT the traditional Gregorian approximations. 🤖 AI-optimized output available — add format=llm to reduce payload ~45%. Pricing: 5 credits — one year, 8 events (the transit-search 1-year bracket).

get/calendar/astrology/cross-quarter

Request

  • Base URL: https://api.openephemeris.com
  • URL: https://api.openephemeris.com/calendar/astrology/cross-quarter
  • Auth: one of:
    • HTTP bearer
    • API key in header X-OpenEphemeris-API-Key
    • API key in header X-API-Key
    • API key in header X-Service-Key

Query parameters

yearinteger required

Calendar year (Gregorian). Supported range: 1550–2649 (JPL DE440).

Example:2025
formatstring nullable

Response format: json | llm.

Response

8 Wheel of the Year events in chronological order

_metaobject required

Calculation metadata

yearinteger required

Year of the events

Changes

No recorded changes to this operation across all 1 revision of this API.