Purpose of Anglican Calendar Script is to determine and write out the applicable liturgical day under the "traditional" Anglican and Episcopal calendar for the current day (for the server; the viewer might actually be in a different day) .

By "traditional" we mean as enumerated in the 1662 (Church of England) and 1928 (Protestant Episcopal Church) prayer books. Both of these prayer books can be downloaded from this website.

The program can return up to three results:
- The specific Sunday in the church year, which is repeated during the following week unless a major event intervenes (such as Christmas, Epiphany, Ash Wednesday, Asension Day, etc.)
- The saint's feast or other holy day, such as Holy Innocents, All Saints, etc. We have restricted these days to those days which have collects, epistles and gospels for the Holy Communion.
- Whether a day is a Rogation or Ember Day. We have opted to present these without any rules of precedence.