A.D. 2099 December
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Tuesday, December 1
- The First Tuesday of Advent
Wednesday, December 2
- The First Wednesday of Advent
Thursday, December 3
- The First Thursday of Advent
Friday, December 4
- The First Friday of Advent
Saturday, December 5
- The First Saturday of Advent
Sunday, December 6
- The Second Sunday in Advent
- Nicholas, Bishop of Myra in Lycia
Monday, December 7
- The Second Monday of Advent
Tuesday, December 8
- The Second Tuesday of Advent
- Conception of the Blessed Virgin Mary
Wednesday, December 9
- The Second Wednesday of Advent
Thursday, December 10
- The Second Thursday of Advent
Friday, December 11
- The Second Friday of Advent
Saturday, December 12
- The Second Saturday of Advent
Sunday, December 13
- The Third Sunday in Advent (Gaudete Sunday)
- Lucy, Virgin and Martyr
Monday, December 14
- The Third Monday of Advent
Tuesday, December 15
- The Third Tuesday of Advent
Wednesday, December 16
- The Third Wednesday of Advent
- O Sapientia
- Ember Day
Thursday, December 17
- The Third Thursday of Advent
- O Adonai
Friday, December 18
- The Third Friday of Advent
- O Radix Jesse
- Ember Day
Saturday, December 19
- The Third Saturday of Advent
- Eve of Saint Thomas
- O Clavis David
- Ember Day
Sunday, December 20
- The Fourth Sunday in Advent
- O Oriens
Monday, December 21
- Saint Thomas, Apostle and Martyr
- The Fourth Monday of Advent
- O Rex Gentium
Tuesday, December 22
- The Fourth Tuesday of Advent
- O Emmanuel
Wednesday, December 23
- The Fourth Wednesday of Advent
- O Virgo Virginum
Thursday, December 24
- The Fourth Thursday of Advent
- Christmas Eve
Friday, December 25
- The Nativity of our Lord (Christmas Day)
Saturday, December 26
- Saint Stephen, First Martyr
- The Second Day of Christmas
Sunday, December 27
- Saint John, Apostle and Evangelist
- The Sunday after Christmas Day
- The Third Day of Christmas
Monday, December 28
- The Innocents’ Day (Childermas)
- The Fourth Day of Christmas
Tuesday, December 29
- The Fifth Day of Christmas
Wednesday, December 30
- The Sixth Day of Christmas
Thursday, December 31
- The Seventh Day of Christmas
- Silvester, Bishop of Rome