About and Sources

Latin Mass Propers sets out the propers of every Mass in the 1962 Roman Missal, the edition used for the Traditional Latin Mass, with the date each Mass is said from 2026 to 2031.

Where the texts come from

• Latin propers and the calendar: the data files of the Divinum Officium project (MIT licence), arranged into the 1962 calendar by Missale Meum’s calendar engine (MIT licence). The Latin liturgical texts themselves are centuries old.
• English readings: the Douay-Rheims Bible in Bishop Challoner’s revision, from Project Gutenberg eBook #1581, public domain in the United States. Each reading is looked up by the reference the Missal gives, so the English is the Bible’s text of those verses; the Missal’s opening words (such as “In illo tempore”) are not repeated in it.

Why only the readings are in English

The English translations of the prayers and chants that circulate online have no documented source, so we can’t show they are free to publish. Until we can match a public-domain translation to every prayer, the prayers and chants are given in Latin only. We would rather leave a gap than publish a text we can’t source.

What this site is not

It is not an official liturgical book and is not approved by any diocese, religious institute or society. At Mass, follow your priest and the books used in your church. For commemorations, the Mass of the day adds the Collect, Secret and Postcommunion of the commemorated feast; those prayers are on that feast’s own page.

Mistakes

If a date or text looks wrong, please tell us.