# colitur

*computus liturgicus* — a safe, highly-tested, deterministic engine that computes
and validates liturgical calendars for multiple rites, with template-driven output.

Starting with the Roman EF (1962) and OF forms; extensible to other traditions.
Computes day-identity (season, celebration, rank, colour, cycle, precedence) and
reading citations, correct to year 9999. See the design and rules research under
`docs/` (local).

## Build

```sh
opam switch create . 5.2.0 -y     # first time: local OCaml switch
opam install -y dune alcotest qcheck qcheck-alcotest
dune build
dune test
dune exec colitur -- easter 2026
```

## License

AGPL-3.0-or-later. See `LICENSE`.