Catholic Faith Today puts the Traditional 1962 Roman Catholic calendar (the Extraordinary Form, as used by the Traditional Latin Mass) side by side with the modern Novus Ordo calendar (the Ordinary Form, the General Roman Calendar in ordinary use since Vatican II), so you can see, for any given day, how the two compare.
What's compared
- What Is Today — the day's season, feria or Sunday designation, and liturgical color.
- Ember Days — the quarterly 1962 fast days, not observed in the modern calendar.
- Fasting & Abstinence — how the two disciplines differ, day by day.
- Solemnities & Feast Days — today's status, and what's coming up next on each calendar.
- Saint of the Day — who's commemorated on each calendar.
The date picker at the top of the page isn't limited to today, it works for any date within about ten years in either direction, recomputed instantly in your browser.
Data & sources
The 1962 calendar's moveable feasts, Ember Days, and major solemnities are computed directly from the date of Easter. Its Saint-of-the-Day list (over 260 entries) was reconstructed from the Missale Meum API, an MIT-licensed project that computes the real 1962 rubrics. The same API supplies the 1962 side's "What Is Today" season/feria designation and liturgical color, refreshed on every build since — unlike the fixed Saint-of-the-Day list — it depends on where Easter falls that year.
The Novus Ordo calendar is computed with romcal, an open-source liturgical calendar library, using the United States calendar and English locale.
Scope & limitations
This is a personal project, kept honest about what it doesn't yet cover. The fasting and abstinence rules model the well-established core of each discipline, but don't yet include the historical vigil fasts (Pentecost, the Assumption, All Saints, and Christmas) pending further research.