 Menologium

Menologium (), also written menology, and menologe, is a service-book used in the Eastern Orthodox Church and those Eastern Catholic Churches which follow the Rite of Constantinople.From its derivation from Greek , "menológion", from μήν "mén" "a month", via Latin "menologium", the literal meaning is "month-set"—in other words, a book arranged according to the months.