It is worth noting the difference between the (the reform of Vatican II) and the Divinum Officium (the traditional Tridentine Breviary). Projects like divinum-officium focus on the traditional Latin breviary and also use data files (often not JSON, but similar structures) to generate the office for the Extraordinary Form.
Liturgically, days begin at Vespers (evening prior). Ensure your JSON passes a liturgical_day_start key, otherwise your prayers will be off by 12 hours.
Before delving into the technical aspects, it is essential to understand the profound meaning and structure of the Liturgy of the Hours itself. It is the public and communal prayer of the Catholic Church, sanctifying the different hours of the day with psalms, Scripture readings, hymns, and prayers [2†L30-L33]. liturgia de las horas.github.io json
One of the most robust tools is the package available on NPM (Node Package Manager). This is a TypeScript library "that generates liturgical calendars and praying content of the Roman Rite of the Roman Catholic Church".
: The /sync/ path in the URL indicates an automated or structured publishing process to keep the daily prayers current. If you'd like, I can: It is worth noting the difference between the
Some projects don't store static JSON but generate it on-the-fly via GitHub Actions. For example, a repository might expose:
liturgiadelashoras/liturgiadelashoras.github.io: Web Content Site One of the most robust tools is the
This is a critical section. The Liturgy of the Hours is a copyrighted text in most countries. The official Spanish edition (published by Conferencia Episcopal Española and Editorial San Pablo ) is not in the public domain.
A simple request to get the liturgical calendar for a given year is straightforward. For example, a GET request to https://litcal.johnromanodorazio.com/api/calendars/2026 would likely return a comprehensive JSON representation of the 2026 liturgical year. The response would include dates for Ash Wednesday, Easter, Pentecost, all Sundays, solemnities, feasts, and memorials.