will 224f34908c Relocate Immaculate Heart of Mary off Aug 22 to Easter+69
Fixed Aug 22 collided outright with the Assumption's own octave-closing
day (both this project's blended calendar tracks are kept deliberately,
so one shouldn't permanently suppress the other). Moved IHM to the
Saturday after the Feast of the Sacred Heart -- its real diocesan date
from 1914 until Pius XII's 1944 fixed-date decree, and also the date the
1969 reform returned to.

Required real new mechanism, not just a data move: a new bespoke
calendar/index.ts override (applyImmaculateHeart, following the existing
applyMarianSaturday/applyChristTheKing precedent), a move from the
sanctoral saints store to the temporal-feasts store (different propers
lookup entirely), and a real bug fix in matins.ts's nocturnReadingIds,
which only ever picked up a *sanctoral* winner's own reading file.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VZSAgRi4QE4XRTqVto93zA
2026-08-22 05:59:33 -04:00
2026-08-16 06:30:00 -04:00

vu

A static, offline-first PWA for praying the Divine Office — Matins, Lauds, Prime, Terce, Sext, None, Vespers, and Compline — in bilingual Latin/English, for any given date.

This isn't a reconstruction of any single historical breviary. It's a personal design that draws on several historical sources without reproducing any one of them exactly: hour structure chiefly from the Monastic Tridentinum (1617), precedence/rubrics from Divino Afflatu, and a calendar merged from both the Tridentine 1906 and Divino Afflatu calendars, with more generous handling of commemorations and octaves than any one historical rite used. See CLAUDE.md (gitignored, not shipped in this repo) or the project's own notes for the full rationale if you're extending it.

There's no backend and no database — everything is a pre-built static bundle, and the app is designed to keep working fully offline once it's been loaded once.

Development

Requires Node.js (developed against Node 20+).

npm install
npm run dev        # start the Vite dev server
npm run build       # type-check (tsc --noEmit) and produce a production build in dist/
npm run preview     # serve the production build locally
npm test            # run the test suite (vitest)

Run a single test file or a subset by name:

npx vitest run tests/hours/vespers.test.ts
npx vitest run -t "some test name"

Running in production

The app is entirely static once built, so "running it" just means serving dist/ — any static file host works, as long as it falls back to index.html for unknown paths (the app does its own client-side routing for URLs like /2026-08-09/prime).

Docker

A Dockerfile builds the static bundle with Node and serves it with Caddy:

docker build -t vu .
docker run -p 8080:80 vu

Or with Docker Compose (docker-compose.yml is included):

docker compose up -d --build

This serves the app on http://localhost:8080. Put a reverse proxy/TLS terminator in front of it for a real deployment; the container itself just listens on port 80 internally and has no configuration, secrets, or external dependencies.

Without Docker

Any static file server works — build the app, then serve dist/ with SPA-style fallback routing. For example, with Caddy directly:

npm run build
caddy file-server --root dist --listen :8080

(For a real deployment you'll want a fallback rule so unknown paths resolve to index.html — see the Caddyfile in this repo for the pattern.)

S
Description
Divine Office / Liturgy of the Hours app (pre-1955-leaning calendar, modified Benedictine psalter, whole-Bible reading plan)
Readme 14 MiB
Languages
TypeScript 99%
CSS 0.9%