The calendar of saints is a traditional Christian method of organizing a liturgical year by associating each day with one or more saints and referring to the day as the feast day or feast of said saint. A Welsh calendar of saint days c. Excerpt from the Irish Feastology of Oengus, presenting the entries for 1 and 2 January in the form of quatrains of four six-saints en Bretagne PDF lines for each day.
As the number of recognized saints increased during Late Antiquity and the first half of the Middle Ages, eventually every day of the year had at least one saint who was commemorated on that date. The earliest feast days of saints were those of martyrs, venerated as having shown for Christ the greatest form of love, in accordance with the teaching: « Greater love has no one than this, that someone lay down his life for his friends. The Tridentine Missal has common formulæ for Masses of Martyrs, Confessors who were bishops, Doctors of the Church, Confessors who were not Bishops, Abbots, Virgins, Non-Virgins, Dedication of Churches, and Feast Days of the Blessed Virgin Mary. Pope Pius XII added a common formula for Popes. This calendar system, when combined with major church festivals and movable and immovable feasts, constructs a very human and personalised yet often localized way of organizing the year and identifying dates. As different Christian jurisdictions parted ways theologically, differing lists of saints began to develop. Feast days are ranked in accordance with their importance.
In the Eastern Orthodox Church the ranking of feasts varies from church to church. In the Russian Orthodox Church they are: Great Feasts, middle, and minor feasts. Archived from the original on 2008-12-02. General Norms for the Liturgical Year and the Calendar ». Estado Libre Asociado de Puerto Rico, Agencia Estatal para el Manejo de Emergencias y Administración de Desastres. East Carolina University, RENCI Engagement Center.