The year in the ecclesiastical calendar; especially feast days and special seasons WordNet 3.0 & Open English WordNet

The liturgical year, also called the church year, Christian year or kalendar, consists of the cycle of liturgical seasons in Christian churches that determines when feast days, including celebrations of saints, are to be observed, and which portions of Scripture are to be read either in an annual cycle or in a cycle of several years. Wikipedia

Determines when feast days, including celebrations of saints, are to be observed Wikipedia Disambiguation

Annually recurring fixed sequence of holy days, seasons, themes and readings Wikidata

Religious day within Christianity Wikidata

holy day within Christianity Wikidata

The annual cycle of liturgical seasons in Christian churches, usually beginning from the Advent. Wiktionary

Cycle of liturgical seasons. Wiktionary (translation)