This document lists and provides brief descriptions of various Marian and Marianist celebrations throughout the year. It discusses important Marian feast days in the Catholic Church like the Immaculate Conception and the Assumption of Mary. It also commemorates founders and members of the Marianist order who were important to the founding and history of the Marianists, such as Blessed Chaminade, Venerable Adèle de Batz de Trenquelleon, and martyred brothers. Many of the celebrations mark anniversaries or occasions important in the founding and history of the Marianist order and their devotion to Mary.