The Solemnity of the Immaculate Conception has long held a significant place in the annual cycle of the Church’s liturgical year. As early as AD 700, a feast dedicated to the “Conception of Mary by Saint Ann” was celebrated in the East on December 9. This commemoration was thought to have been initially inspired by the non-canonical Protoevangelium of James, which described the events surrounding Saint Ann’s conception of Holy Mary, despite the former having been thought barren due to her advanced years. December 9 was chosen as the day for this commemoration as it fell nine months prior to September 8, the day on which the birth of Mary was celebrated by the Eastern Church.
In Rome, a similar feast began to be celebrated in the 15th century, albeit with special focus on the Blessed Mother’s Immaculate Conception. This dogma was initially the subject of debate amongst scholastic authors, some of whom questioned how Mary could be conceived without sin prior to the events by which her Son redeemed humanity. Blessed John Duns Scotus (d. 1308) is credited with developing the Church’s theological understanding of the Immaculate Conception of Mary as “preservative redemption.” This belief was later dogmatically defined in 1854, when Pope Pius IX formally declared that Mary “was by a singular grace and privilege of Almighty God, and in view of the merits of Jesus Christ, Savior of the human race, preserved free from all stain of original sin” (Ineffabilis Deus). The title of Holy Mary as “the Immaculate Conception” was again affirmed a few years later within the Marian apparitions in 1858 to Saint Bernadette at Lourdes, France, where Our Lady declared herself to be the Immaculate Conception.
Even before these events, the Solemnity of the Immaculate Conception had long been celebrated as an important feast day in the Church. Pope Clement XI ordered the Solemnity of the Immaculate Conception to be celebrated as a holy day of obligation for the entire Church in 1708, and it has remained so ever since. Our Lady under the title of the Immaculate Conception has also been the patroness of the United States since 1846, when the US bishops placed the entire country, and not only the Church in the United States, under her care at the Sixth Provincial Council of Baltimore. Some scholars believe that this decision on the part of the US bishops may have influenced Pope Pius IX to make his own dogmatic declaration some eight years later.
Holy Mary, the Immaculate Conception, remains the patroness of the United States even today, and this commemoration on December 8 is always celebrated as a solemnity and a holy day of obligation in this country, irrespective of the day of the week on which it falls in any year. This is different from several other holy days of obligation, including the Solemnity of Mary, Mother of God (January 1), the Solemnity of the Assumption of Our Lady (August 15), and the Solemnity of All Saints (November 1). Should these dates fall on a Saturday or Monday, the obligation to attend Mass is abrogated, per a 1993 decision on the part of the US bishops.
A related question concerns when and how to celebrate this Solemnity when its date coincides with a Sunday during the Advent season. The “Table of Liturgical Days According to Their Order of Precedence” in the Universal Norms on the Liturgical Year and the General Roman Calendar indicates that, when these two celebrations overlap, the Advent Sunday takes precedence. The Universal Norms state that, in such cases, the impeded Solemnity should be transferred to the next closest date, which would be the Monday following the Advent Sunday (56c).
For many years, the understanding in the United States was that, when the date of the Solemnity of the Immaculate Conception was transferred in a particular year, the obligation to attend Mass on this day did not also transfer. However, more recently, Bishop Thomas J. Paprocki, Chairman of the USCCB’s Committee on Canonical Affairs and Church Governance, wrote to the Holy See seeking clarification on the obligation to attend Mass when a holy day of obligation in Advent, Lent, or Easter falls on Sunday and the Solemnity is transferred to Monday. In a letter to the US bishops dated October 10, 2024, Bishop Paprocki communicated the Dicastery for Legislative Text’s response: “the feast must be observed as a day of obligation on the day to which it is transferred.” In light of this new directive, the Solemnity of the Immaculate Conception on Monday, December 9, 2024 is to be observed as a holy day of obligation this year and in all future years when the celebration is transferred to Monday.
Long-time readers of the Liturgy Update are already aware that the celebration of solemnities begins on the evening of the previous day. As such, when two solemnities follow each other in succession, there can sometimes be questions as to which Mass texts should be used on evenings with two overlapping celebrations. The Universal Norms state that when “several celebrations fall on the same day, the one that holds the highest rank according to the Table of Liturgical Days is observed.” Following this principle, all Masses on December 8, 2024 should use the liturgical texts for the Second Sunday of Advent, bearing in mind that a Sunday in Advent outranks Solemnities of the Blessed Virgin Mary, including that of the Immaculate Conception.
With respect to the obligation to attend Mass on these days, one may satisfy this precept for the Sunday of Advent at any Mass from 4pm on Saturday, December 7 through midnight of Sunday, December 8. The obligation to attend Mass on the Solemnity of the Immaculate Conception can be fulfilled at any Mass from 4pm on Sunday, December 8 (irrespective of the Mass texts used) through midnight on Monday, December 9. In the latter case, attending Mass on Monday, December 9 would be more ideal, bearing in mind the given opportunity to hear the readings and prayers associated with this beautiful Solemnity dedicated to Our Lady.