The Congregation for Divine Worship and the Discipline of the Sacraments has clarified that the Memorial of the Blessed Virgin Mary, Mother of the Church, must be celebrated by everyone, beginning this year. The new feast is to be observed on the Monday following Pentecost because Pentecost is a movable feast, tied to the celebration of Easter, it is possible that the new Memorial could coincide with another Memorial of a Saint or Blessed; and when this happens, the feast of Mary, Mother of the Church, will take precedence.
The new feast was inserted into the Universal Calendar for the Latin Church earlier this year by Pope Francis, in a decree dated 11 February 2018 – the 160th anniversary of the apparition of Mary at Lourdes. The title of “Mother of the Church” was famously bestowed on the Blessed Virgin Mary by Blessed Pope Paul VI during the Second Vatican Council.
Source: en.radiovaticana.va
