December
- 1: Feria
- 2: St. Bibiana Virgin and Martyr, Semidouble.
- 3: St. Francis Xavier Confessor, Greater Double.
- 4: St. Peter Chrysologus Bishop, Confessor, and Doctor of the Church, Double, Com. of St. Barbara Virgin and Martyr.
- 5: Com. of St. Sabbas Abbot.
- 6: St. Nicholas Bishop and Confessor, Double.
- 7: St. Ambrose Bishop, Confessor, and Doctor of the Church, Double, Com. of the Vigil.
- 8: The Immaculate Conception of the Blessed Virgin Mary, Double of the I Class
- 9: Of the II day within the Octave of the Immaculate Conception, Semidouble.
- 10: Of the III day within the Octave of the Immaculate Conception, Semidouble, Com. of St. Melchiades Pope and Martyr.
- 11: St. Damasus I Pope and Confessor, Semidouble, Com. of the Octave of the Immaculate Conception.
- 12: Of the V day within the Octave of the Immaculate Conception, Semidouble.
- 13: St. Lucy Virgin and Martyr, Double, Com. of the Octave of the Immaculate Conception.
- 14: Of the VII day within the Octave of the Immaculate Conception, Semidouble.
- 15: Octave of the Immaculate Conception, Greater Double.
- 16: St. Eusebius Bishop and Martyr, Semidouble.
- 17: Feria
- 18: Feria
- 19: Feria
- 20: Vigil.
- 21: St. Thomas Apostle, Double of the II Class.
- 22: Feria
- 23: Feria
- 24: Vigil.
- 25: Nativity of our Lord Jesus Christ, Double of the I Class with a privileged Octave of the III rank.
- 26: St. Stephen Protomartyr, Double of the II class with a simple Octave, Com. of the Octave of the Nativity.
- 27: St. John Apostle and Evangelist, Double of the II class with a simple Octave, Com. of the Octave of the Nativity.
- 28: The Holy Innocents, Double of the II class with a simple Octave, Com. of the Octave of the Nativity.
- 29: St. Thomas Bishop and Martyr, Double, Com. of the Octave of the Nativity.
- 30: Of the VI day within the Octave of the Nativity, Semidouble.
- 31: St. Sylvester I Pope and Confessor, Double, Com. of the Octave of the Nativity.
Although not listed on the general Calendar, a commemoration of St. Anastasia Martyr is made at the second Mass on Christmas Day.
Read more about this topic: General Roman Calendar Of 1954