December 2003
| Day | Date | Celebration | Rank |
|---|---|---|---|
| Day | Date | Celebration | Rank |
| Monday | 1 | week 1 | |
| Tuesday | 2 | ||
| Wednesday | 3 | St Francis Xavier, priest | memorial |
| Thursday | 4 | St John Damascene, priest, doctor of the Church | |
| Friday | 5 | ||
| Saturday | 6 | St Nicholas, bishop | |
| Sunday | 7 | 2nd Sunday of Advent | week 2 |
| Monday | 8 | The Immaculate Conception of the Virgin Mary | solemnity |
| Tuesday | 9 | ||
| Wednesday | 10 | St John Roberts, priest, martyr (in Wales) | |
| Thursday | 11 | St Damasus I, pope | |
| Friday | 12 | St Jane Frances de Chantal | |
| Saturday | 13 | St Lucy, virgin, martyr | memorial |
| Sunday | 14 | 3rd Sunday of Advent | week 3 |
| Monday | 15 | ||
| Tuesday | 16 | ||
| Wednesday | 17 | ||
| Thursday | 18 | ||
| Friday | 19 | ||
| Saturday | 20 | ||
| Sunday | 21 | 4th Sunday of Advent | week 4 |
| Monday | 22 | ||
| Tuesday | 23 | St John of Kanty, priest | |
| Wednesday | 24 | ||
| Thursday | 25 | The Nativity of the Lord | solemnity |
| Friday | 26 | St Stephen, first martyr | feast |
| Saturday | 27 | St John, apostle, evangelist | feast |
| Sunday | 28 | The Holy Family | feast |
| Monday | 29 | St Thomas Becket, bishop, martyr | |
| Tuesday | 30 | ||
| Wednesday | 31 | St Sylvester I, pope |