Holy Day of Obligation

he Solemnity of All Saints, celebrated annually on November 1st, is a major Catholic holy day honoring all saints in heaven, including both canonized saints and the countless unknown souls who have reached1 eternal life, it calls on Catholics to attend Mass, celebrate the lives of the holy, and reflect on their own call to holiness.

The Solemnity of the Immaculate Conception, celebrated on December 8. Proclaimed a dogma in 1854, it highlights Mary as full of grace and a model of faith.

The Solemnity of the Nativity of Our Lord Jesus Christ, celebrated on December 25, is the highest-ranking Christian feast (after Easter) commemorating the birth of Jesus in Bethlehem. It centers on the Incarnation—God becoming human—and is a Holy Day of Obligation, marking the beginning of the Christmas season with joy and adoration.

The Solemnity of Mary, Mother of God, celebrated on January 1st. This high-ranking feast, occurring on the Octave of Christmas, highlights Mary's vital role in salvation history and starts the New Year by celebrating her as the Theotokos (God-bearer) *Canon 1246, §2 - Holy Days of Obligation