A.D. 1966 December 18–24
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday, December 18
- The Fourth Sunday in Advent
- O Radix Jesse
Monday, December 19
- The Fourth Monday of Advent
- O Clavis David
Tuesday, December 20
- The Fourth Tuesday of Advent
- Eve of Saint Thomas
- O Oriens
Wednesday, December 21
- Saint Thomas, Apostle and Martyr
- The Fourth Wednesday of Advent
- O Rex Gentium
Thursday, December 22
- The Fourth Thursday of Advent
- O Emmanuel
Friday, December 23
- The Fourth Friday of Advent
- O Virgo Virginum
Saturday, December 24
- The Fourth Saturday of Advent
- Christmas Eve