December 2023
| Day | Date | Celebration | Rank |
|---|---|---|---|
| Friday | 1 | Weekday of Advent | |
| Saturday | 2 | Weekday of Advent | |
| Sunday | 3 | 1st Sunday of Advent | Week I |
| Monday | 4 | Weekday of Advent, St John Damascene, Priest, Doctor of the Church |
|
| Tuesday | 5 | Weekday of Advent | |
| Wednesday | 6 | Weekday of Advent, St Nicholas, Bishop |
|
| Thursday | 7 | St Ambrose, Bishop, Doctor of the Church | memorial |
| Friday | 8 | The Immaculate Conception of the Blessed Virgin Mary | solemnity |
| Saturday | 9 | Weekday of Advent, St Juan Diego Cuahtlatoatzin |
|
| Sunday | 10 | 2nd Sunday of Advent | Week II |
| Monday | 11 | Weekday of Advent, St Damasus I, Pope |
|
| Tuesday | 12 | Weekday of Advent, Our Lady of Guadalupe |
|
| Wednesday | 13 | St Lucy, Virgin, Martyr | memorial |
| Thursday | 14 | St John of the Cross, Priest, Doctor of the Church | memorial |
| Friday | 15 | Weekday of Advent | |
| Saturday | 16 | Weekday of Advent | |
| Sunday | 17 | 3rd Sunday of Advent | Week III |
| Monday | 18 | Weekday of Advent | |
| Tuesday | 19 | Weekday of Advent | |
| Wednesday | 20 | Weekday of Advent | |
| Thursday | 21 | Weekday of Advent, St Peter Canisius, Priest, Doctor of the Church |
|
| Friday | 22 | Weekday of Advent | |
| Saturday | 23 | Weekday of Advent, St John of Kanty, Priest |
|
| Sunday | 24 | 4th Sunday of Advent | Week IV |
| Monday | 25 | The Nativity of the Lord | solemnity |
| Tuesday | 26 | St Stephen, the first Martyr | feast |
| Wednesday | 27 | St John, Apostle, Evangelist | feast |
| Thursday | 28 | The Holy Innocents, Martyrs | feast |
| Friday | 29 | 5th day of Christmas Octave, St Thomas à Becket, Bishop, Martyr |
feast (E) |
| Saturday | 30 | 6th day of Christmas Octave | |
| Sunday | 31 | The Holy Family of Jesus, Mary and Joseph | feast |
| Day | Date | Celebration | Rank |