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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:

• January 1, the solemnity of Mary, Mother of God;
• Thursday of the Sixth Week of Easter, the solemnity of the Ascension;
• August 15, the solemnity of the Assumption of the Blessed Virgin Mary;
• November 1, the solemnity of All Saints;
• December 8, the solemnity of the Immaculate Conception;
• December 25, the solemnity of the Nativity of Our Lord Jesus Christ.

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 (commandment) to attend Mass is abrogated (i.e., formally revoked or removed).

The U.S. Conference of Catholic Bishops provided the following calendar of Holy Days of Obligation in their Liturgical Calendar for the Dioceses of the United States of America, 2010 . (The Liturgical Calendar for 2010 begins on the first Sunday of Advent on November 29, 2009.)

Holy Days of Obligation in 2010

• Friday, January 1: the solemnity of Mary, Mother of God
• Thursday, May 13: the solemnity of the Ascension
• Wednesday, December 8: the Immaculate Conception of the Blessed Virgin Mary
• Saturday, December 25: The Nativity of the Lord (Christmas)