Christian year

The liturgical year, also known as the Christian year, consists of the cycle of liturgical seasons in Christian churches which determines when Feasts, Memorials, Commemorations, and Solemnities are to be observed and which portions of Scripture are to be read. Distinct liturgical colours may appear in connection with different seasons of the liturgical year. The dates of the festivals vary somewhat between the Western (Roman Catholic, Anglican, Lutheran and Protestant) churches and the Eastern Orthodox Churches, though the sequence and logic is the same.
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Noun
1. the year in the ecclesiastical calendar; especially feast days and special seasons
(synonym) church year
(hypernym) year, twelvemonth, yr
(part-meronym) religious holiday, holy day

ANNO LITURGICO. ANNO ECCESIASTICO. ANNO DEL CALENDARIO GREGORIANO