Immaculate Conception on an Advent Sunday: When to go to Mass?

A firefighter in Rome pays tribute to the Blessed Virgin Mary by laying a wreath of fresh flowers at her statue atop a column near the Spanish Steps at dawn on Dec. 8, 2023. / Credit: Daniel Ibanez/CNA

CNA Staff, Dec 7, 2024 / 07:00 am (CNA).

This year, the solemnity of the Immaculate Conception, which is a holy day of obligation, falls on the Second Sunday of Advent. So, are Catholics obligated to go to Mass twice? The answer is yes.

The solemnity of the Immaculate Conception is celebrated each year on Dec. 8. Since this year the solemnity falls on the Second Sunday of Advent, its observance is “transferred” to Monday, Dec. 9, because a Sunday in Advent takes liturgical precedence.

In the past, the obligation to attend Mass on a transferred holy day of obligation was not transferred along with the feast day when it fell on a Monday. Yet the Vatican has directed that the solemnity of the Immaculate Conception will henceforth be observed as a holy day of obligation no matter what day it falls on or is transferred to.

This change comes after the Vatican responded to a query from the U.S. Conference of Catholic Bishops (USCCB). Earlier this year Bishop Thomas Paprocki, the chairman of the USCCB’s Committee on Canonical Affairs and Church Governance, wrote to the Vatican seeking clarification on whether an obligation transfers when the feast itself is transferred.

The Vatican’s Dicastery for Legislative Texts responded in a letter to the Springfield, Illinois, bishop stating that the feasts in question “are always days of obligation … even when the aforementioned transfer of the feast occurs.”

Archbishop Filippo Iannone, the prefect of the Dicastery for Legislative Texts, told Paprocki that “the feast must be observed as a day of obligation on the day to which it is transferred.”

This change does not impact a Catholic’s normal obligation to attend Mass every Sunday, meaning the faithful have the opportunity to attend Mass twice in the next few days — for the Second Sunday of Advent and for the solemnity of the Immaculate Conception.

Here are some different options to fulfill both obligations:

• A Mass on Saturday evening (after 4 p.m.) and a Mass on Monday

• A Mass on Saturday evening (after 4 p.m.) and a Mass on Sunday evening (after 4 p.m.)

• A Mass on Sunday morning/early afternoon (before 4 p.m.) and a Mass on Sunday evening (after 4 p.m.)

• A Mass on Sunday morning/early afternoon (before 4 p.m.) and a Mass on Monday

• A Mass on Sunday evening (after 4 p.m.) and a Mass on Monday

The solemnity of the Immaculate Conception was established by Pope Pius IX in 1854 with the papal encyclical Ineffabilis Deus. In this encyclical, Pius IX defined the long-held belief by the Catholic Church that Mary was conceived free from original sin.

Mary was granted this extraordinary privilege because of her unique role in history as the mother of God. That is, she was preserved free from all stain of original sin from the very moment of her conception.

The Catechism of the Catholic Church explains that “to become the mother of the Savior, Mary ‘was enriched by God with gifts appropriate to such a role.’ The angel Gabriel at the moment of the annunciation salutes her as ‘full of grace.’ In fact, in order for Mary to be able to give the free assent of her faith to the announcement of her vocation, it was necessary that she be wholly borne by God’s grace” (No. 490).

“Through the centuries the Church has become ever more aware that Mary, ‘full of grace’ through God, was redeemed from the moment of her conception,” the catechism states. “That is what the dogma of the Immaculate Conception confesses, as Pope Pius IX proclaimed in 1854” (No. 491).