The Holy Days of Obligation for 2023 are The Assumption of Mary (Tuesday, 15 August), All Saints (Wednesday, 1 November), Immaculate Conception (Friday, 8 December), and the Nativity of the Lord (Monday, 25 December).
Each year the Secretariat of Divine Worship of the United States Conference of Catholic Bishops publishes the Liturgical Calendar for the Dioceses of the United States of America. This calendar is primarily used by authors of ordines and other liturgical aids published to foster the celebration of the liturgy in our country, but may also be used by anyone who purchases or downloads a copy.
The calendar is based upon the General Roman Calendar, promulgated by Pope Saint Paul VI on February 14, 1969, subsequently amended by the Holy See, and the Proper Calendar for the Dioceses of the United States of America, approved by the USCCB and confirmed in 2010 by the Congregation for Divine Worship and the Discipline of the Sacraments.
2023 USCCB Liturgical Calendar