- Sat1Saturday of the thirty-fourth week of Ordinary TimeWeekday
- Sun2First Sunday of AdventSunday
- Mon3Saint Francis Xavier, PriestMemorial
- Tue4Tuesday of the first week of AdventWeekdaySaint John Damascene, Priest and Doctor of the Church (Optional Memorial)
- Wed5Wednesday of the first week of AdventWeekday
- Thu6Thursday of the first week of AdventWeekdaySaint Nicholas, Bishop (Optional Memorial)
- Fri7Saint Ambrose, Bishop and Doctor of the ChurchMemorial
- Sat8The Immaculate Conception of the Blessed Virgin Mary, Patroness of the USASolemnity
- Sun9Second Sunday of AdventSunday
- Mon10Monday of the second week of AdventWeekdayOur Lady of Loreto (Optional Memorial)
- Tue11Tuesday of the second week of AdventWeekdaySaint Damasus I, Pope (Optional Memorial)
- Wed12Our Lady of Guadalupe, Patroness of the AmericasFeast
- Thu13Saint Lucy, Virgin and MartyrMemorial
- Fri14Saint John of the Cross, Priest and Doctor of the ChurchMemorial
- Sat15Saturday of the second week of AdventWeekday
- Sun16Third Sunday of AdventSunday
- Mon17December 17Privileged Weekday
- Tue18December 18Privileged Weekday
- Wed19December 19Privileged Weekday
- Thu20December 20Privileged Weekday
- Fri21December 21Privileged WeekdaySaint Peter Canisius, Priest and Doctor of the Church (Optional Memorial)
- Sat22December 22Privileged Weekday
- Sun23Fourth Sunday of AdventSunday
- Mon24December 24Privileged Weekday
- Tue25The Nativity of the Lord (Christmas)Solemnity
- Wed26Saint Stephen, the First MartyrFeast
- Thu27Saint John, Apostle and EvangelistFeast
- Fri28The Holy Innocents, MartyrsFeast
- Sat29Fifth Day within the Octave of the Nativity of the LordPrivileged WeekdaySaint Thomas Becket, Bishop and Martyr (Optional Memorial)
- Sun30The Holy Family of Jesus, Mary and JosephFeast
- Mon31Seventh Day within the Octave of the Nativity of the LordPrivileged WeekdaySaint Sylvester I, Pope (Optional Memorial)