Liturgical Calendar API
The Roman Rite calendar for any year, nation or diocese.
- Free
- No key
- Open source
Description
John Romano D'Orazio's calendar service, and the most complete implementation going: the General Roman Calendar plus national and diocesan propers, from 1970 to any year you ask for, in several languages and with an OpenAPI schema. The Catholic Digital Commons Foundation's Martyrology API and MCP server are both built against it, which makes it the de facto backbone of the Catholic liturgical data stack.
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