At their plenary assembly in November 1991, with follow-up mail balloting by absentees, the members of the National Conference of Catholic Bishops approved two motions which affect the observance of holy days of obligation in the dioceses of the United States. They decided that 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. The next month, Archbishop Daniel E. Pilarczyk, president of the NCCB, requested confirmation of this decision from the Vatican Congregation of Bishops.