Pope Francis added this feast to the Roman Calendar in March.
The new Memorial of Mary, Mother of the Church, which Pope Francis inserted into the Roman Calendar in March, will be celebrated for the first time Monday.
The liturgical celebration, Beata Mariæ Virginis, Ecclesiæ Matris, is to be celebrated annually as a memorial.
From this year, all the dioceses and parishes will celebrate this feast the Monday following Pentecost. This official celebration underlines a characteristic of the Virgin Mary, who is both mother of Christ and of the Church.
Being a memorial, this celebration includes its own readings. All calendars and liturgical books will thus include this memorial for both the Mass and the Liturgy of the Hours. The reading of the breviary, in fact, includes the text of Paul VI’s proclamation of Mary as Mother of the Church.
The Decree was released March 3, 2018, by the Congregation for Divine Worship and the Discipline of the Sacraments.
Cardinal Robert Sarah, the Congregation’s Prefect, explained the pope’s decision is based on the ancient tradition built around the devotion to Mary as Mother of the Church.
Cardinal Sarah also explained that Pope Francis wishes to promote this devotion in order to “encourage the growth of the maternal sense of the Church in the pastors, religious and faithful, as well as a growth of genuine Marian piety,” Devin Watkins explained in an article published by Vatican News.
The decree itself revisits and explains the history of Marian theology in the Church’s liturgical tradition and the writings of the Church Fathers. It quotes St. Augustine and Pope St. Leo the Great’s reflections on the importance of the Virgin Mary not only in the life of the Church but also in the life of Christ Himself:
In fact the former [St. Augustine] says that Mary is the mother of the members of Christ, because with charity she cooperated in the rebirth of the faithful into the Church, while the latter [St. Leo the Great] says that the birth of the Head is also the birth of the body, thus indicating that Mary is at once Mother of Christ, the Son of God, and mother of the members of his Mystical Body, which is the Church.
The decree explains such reflections are a result of the “divine motherhood of Mary and from her intimate union in the work of the Redeemer,” and explains Mary became Mother of the Church when, at the foot of the Cross (cf. Jn 19:25), she “accepted her Son’s testament of love and welcomed all people in the person of the beloved disciple as sons and daughters to be reborn unto life eternal.”
This decree was signed on February 11, 2018, feast of Our Lady of Lourdes. The liturgical texts, as well as their translations approved by the episcopal conferences, are to be published after the confirmation of the Dicastery.
The full text of the decree can be read here.