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date: 12 August 2020


  • Robert G. Calkins


As applied to medieval manuscripts, a list of the principal feast days of the Church and the commemorative feasts of the saints throughout the liturgical year. It was an essential part of books used to celebrate Mass (the Missal, Pontifical, and Benedictional) and the Divine Office (the Psalter and Breviary), as well as of books of prayers used for private devotion (e.g. Book of Hours). Major Church feasts (e.g. Christmas and Easter), the commemorative days of the Apostles and other major saints or the names of saints particularly important in the diocese for which the book was made might be highlighted by being written in red, gold, or blue. The text usually begins with an embellished KL (for Kalends, the Latin name for the first day of the month); the days of the week are indicated by lower-case letters a–g, accompanied by abbreviations of Ides (the 9th day before Nones) and Nones (the 13th or 15th day of the month). Golden numbers (i–xix) might also appear in the left column for calculating the date of the Paschal moon (relevant to the date of Easter). Normally the text for such a calendar, with a line allocated to each day, occupied the ...

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