The Catholic Holy Days of Obligation are our most important feast days. They are the principal liturgical feasts that honor the mysteries of the Lord, the Virgin Mary, and the saints. Rejoice! Catholics know that these are the most important days of the year and of course the best way to celebrate them is to celebrate Holy Mass with all the angels and saints!
On December 13, 1991 the members of the National Conference of Catholic Bishops of the United States of America made the following general decree concerning holy days of obligation for Latin rite Catholics:
In addition to Sunday, the days to be observed as holy days of obligation in the Latin Rite dioceses of the United States of America, in conformity with canon 1246, are as follows:
2018 Holy Days of Obligation (Canon 1246, §2)
Monday, January 1, 2018 - Solemnity of Mary, Mother of God (Falls on Monday - Not a Holy Day of Obligation)
Thursday, May 10 - Ascension of Jesus
Wednesday, August 15 - Assumption of the Blessed Virgin Mary
Thursday, November 1 - All Saints' Day
Saturday, December 8 - Feast of the Immaculate Conception
Tuesday, December 25 - Christmas
Whenever January 1, the solemnity of Mary, Mother of God, or August 15, the solemnity of the Assumption, or November 1, the solemnity of All Saints, falls on a Saturday or on a Monday, the precept to attend Mass is abrogated.
This decree of the Conference of Bishops was approved and confirmed by the Apostolic See by a decree of the Congregation for Bishops (Prot. N. 296/84), signed by Bernardin Cardinal Gantin, prefect of the Congregation, and dated July 4, 1992.
As President of the National Conference of Catholic Bishops, I hereby declare that the effective date of this decree for all the Latin rite dioceses of the United States of America will be January 1, 1993, the solemnity of Mary, Mother of God.
Given at the offices of the National Conference of Catholic Bishops in Washington, DC, November 17, 1992.
+ Daniel E. Pilarczyk Archbishop of Cincinnati President of the National Conference of Catholic Bishops