December 2005
| Day | Date | Celebration | Rank |
|---|---|---|---|
| Day | Date | Celebration | Rank |
| Thursday | 1 | Weekday of Advent | |
| Friday | 2 | Weekday of Advent | |
| Saturday | 3 | St Francis Xavier, priest | memorial |
| Sunday | 4 | 2nd Sunday of Advent | Week 2 |
| Monday | 5 | Weekday of Advent | |
| Tuesday | 6 | Weekday of Advent or St Nicholas, bishop |
|
| Wednesday | 7 | St Ambrose, bishop, doctor of the Church | memorial |
| Thursday | 8 | The Immaculate Conception of the Virgin Mary | solemnity |
| Friday | 9 | Weekday of Advent or St John Diego Cuahtlatoatzin |
|
| Saturday | 10 | Weekday of Advent; St John Roberts, priest, martyr (in Wales) |
|
| Sunday | 11 | 3rd Sunday of Advent | Week 3 |
| Monday | 12 | Weekday of Advent or Our Lady of Guadalupe |
|
| Tuesday | 13 | St Lucy, virgin, martyr | memorial |
| Wednesday | 14 | St John of the Cross, priest, doctor of the Church | memorial |
| Thursday | 15 | Weekday of Advent | |
| Friday | 16 | Weekday of Advent | |
| Saturday | 17 | Weekday of Advent | |
| Sunday | 18 | 4th Sunday of Advent | Week 4 |
| Monday | 19 | Weekday of Advent | |
| Tuesday | 20 | Weekday of Advent | |
| Wednesday | 21 | Weekday of Advent, St Peter Canisius, priest, doctor of the Church |
|
| Thursday | 22 | Weekday of Advent | |
| Friday | 23 | Weekday of Advent, St John of Kanty, priest |
|
| Saturday | 24 | Weekday of Advent | |
| Sunday | 25 | The Nativity of the Lord | solemnity |
| Monday | 26 | St Stephen, first martyr | feast |
| Tuesday | 27 | St John, apostle, evangelist | feast |
| Wednesday | 28 | The Holy Innocents, martyrs | feast |
| Thursday | 29 | 5th day of Christmas Octave; St Thomas Becket, bishop, martyr |
|
| Friday | 30 | The Holy Family | feast |
| Saturday | 31 | 7th day of Christmas Octave; St Sylvester I, pope |