A menologium (/mɛnəˈloʊdʒiəm/, pl. menologia), also known by other names, is any collection of information arranged according to the days of a month, usually a set of such collections for all the months of the year. In particular, it is used for ancient Roman farmers' almanacs (menologia rustica); for the untitled Old English poem on the Julian calendar that appears in a manuscript of the Anglo-Saxon Chronicle; for the liturgical books (also known as the menaia) used by the Eastern Orthodox Church and Eastern Catholic Churches following the Byzantine Rite that list the propers for fixed dates, typically in twelve volumes covering a month each and largely concerned with saints; for hagiographies (also known as synaxaria) and liturgical calendars written as part of this tradition; and for equivalents of these works among Roman Catholic religious orders for organized but private commemoration of their notable members.