December 2004
| Day | Date | Celebration | Rank |
|---|---|---|---|
| Day | Date | Celebration | Rank |
| Wednesday | 1 | Weekday of Advent | |
| Thursday | 2 | Weekday of Advent | |
| Friday | 3 | St Francis Xavier, priest | memorial |
| Saturday | 4 | Weekday of Advent, St John Damascene, priest, doctor of the Church |
|
| Sunday | 5 | 2nd Sunday of Advent | |
| Monday | 6 | Weekday of Advent, St Nicholas, bishop |
|
| Tuesday | 7 | St Ambrose, bishop, doctor of the Church | memorial |
| Wednesday | 8 | The Immaculate Conception of the Virgin Mary | solemnity |
| Thursday | 9 | Weekday of Advent St John Diego Cuahtlatoatzin |
|
| Friday | 10 | Weekday of Advent St John Roberts, priest, martyr (in Wales) |
|
| Saturday | 11 | Weekday of Advent St Damasus I, pope |
|
| Sunday | 12 | 3rd Sunday of Advent | |
| Monday | 13 | St Lucy, virgin, martyr | memorial |
| Tuesday | 14 | St John of the Cross, priest, doctor of the Church | memorial |
| Wednesday | 15 | Weekday of Advent | |
| Thursday | 16 | Weekday of Advent | |
| Friday | 17 | Weekday of Advent | |
| Saturday | 18 | Weekday of Advent | |
| Sunday | 19 | 4th Sunday of Advent | |
| Monday | 20 | Weekday of Advent | |
| Tuesday | 21 | Weekday of Advent St Peter Canisius, priest, doctor of the Church |
|
| Wednesday | 22 | Weekday of Advent | |
| Thursday | 23 | Weekday of Advent St John of Kanty, priest |
|
| Friday | 24 | Weekday of Advent | |
| Saturday | 25 | The Nativity of the Lord | solemnity |
| Sunday | 26 | The Holy Family | feast |
| Monday | 27 | St John, apostle, evangelist | feast |
| Tuesday | 28 | The Holy Innocents, martyrs | feast |
| Wednesday | 29 | 5th day of Christmas Octave St Thomas Becket, bishop, martyr |
|
| Thursday | 30 | 6th day of Christmas Octave | |
| Friday | 31 | 7th day of Christmas Octave St Sylvester I, pope |