Feasts
| Name | Description | Code | Feast |
|---|---|---|---|
| Abdonis et Sennis | Abdon and Sennen, Martyrs |
14073000 | 21 |
| Ad aquam benedictio | Chants for the blessing of water |
16010000 | 3 |
| Ad aspersionem aquae benedictae | For the sprinkling of Holy Water |
16023000 | 30 |
| Ad aspersionem aquae benedictae TP | For the sprinkling of Holy Water in Eastertide |
16023080 | 30 |
| Ad lavandum altaria | Chants for the washing of the altar |
16024000 | 4 |
| Ad Mandatum | At the Mandatum (Foot-Washing) |
07065010 | 67 |
| Ad Processionem | For Processions |
16009000 | 37 |
| Ad recipiendum prelatum vel legatum | For the reception of prelates or legates |
4 | |
| Adalberti | Adalbert of Prague, Bishop and Martyr |
14042310 | 5 |
| Adv., Antiphonae Majores | Great 'O' Antiphons |
01048010 | 7 |
| Adv., dom. | Sundays in Advent |
01001000 | 6 |
| Adv., hebd 1 | 1st week of Advent |
01018000 | 16 |
| Adv., hebd. 1, fer. 2 | Monday, 1st week, Advent |
01012000 | 46 |
| Adv., hebd. 1, fer. 3 | Tuesday, 1st week, Advent |
01013000 | 6 |
| Adv., hebd. 1, fer. 4 | Wednesday, 1st week, Advent |
01014000 | 10 |
| Adv., hebd. 1, fer. 5 | Friday, 1st week, Advent |
01016000 | 10 |
| Adv., hebd. 1, fer. 5 | Thursday, 1st week, Advent |
01015000 | 6 |
| Adv., hebd. 1, sabbato | Saturday, 1st week, Advent |
01017000 | 6 |
| Adv., hebd. 2 | 2nd week of Advent |
01028000 | 16 |
| Adv., hebd. 2, fer. 2 | Monday, 2nd week, Advent |
01022000 | 6 |
| Adv., hebd. 2, fer. 3 | Tuesday, 2nd week, Advent |
01023000 | 7 |
| Adv., hebd. 2, fer. 4 | Wednesday, 2nd week, Advent |
01024000 | 6 |
| Adv., hebd. 2, fer. 5 | Thursday, 2nd week, Advent |
01025000 | 6 |
| Adv., hebd. 2, fer. 6 | Friday, 2nd week, Advent |
01026000 | 7 |
| Adv., hebd. 2, sabbato | Saturday, 2nd week, Advent |
01027000 | 6 |
| Adv., hebd. 3, fer. 2 | Monday, 3rd week, Advent |
01032000 | 54 |
| Adv., hebd. 3, fer. 3 | Tuesday, 3rd week, Advent |
01033000 | 43 |
| Adv., hebd. 3, fer. 4 | Wednesday, 3rd week, Advent |
01034000 | 43 |
| Adv., hebd. 3, fer. 4 Q.T. | Ember Day, Advent (Wednesday) |
01034009 | 84 |
| Adv., hebd. 3, fer. 5 | Thursday, 3rd week, Advent |
01035000 | 39 |
| Adv., hebd. 3, fer. 6 | Friday, 3rd week, Advent |
01036000 | 65 |
| Adv., hebd. 3, fer. 6 Q.T. | Ember Day, Advent (Friday) |
01036009 | 48 |
| Adv., hebd. 3, sabbato | Saturday, 3rd week, Advent |
01037000 | 57 |
| Adv., hebd. 3, sabbato Q.T. | Ember Day, Advent (Saturday) |
01037009 | 107 |
| Adv., hebd. 4 | 4th week of Advent |
01041800 | 5 |
| Adv., hebd. 4, fer. 2 | Monday, 4th week, Advent |
01042000 | 2 |
| Adv., hebd. 4, fer. 3 | Tuesday, 4th week, Advent |
01043000 | 1 |
| Adv., hebd. 4, fer. 4 | Wednesday, 4th week, Advent |
01044000 | 1 |
| Adv., hebd. 4, fer. 5 | Thursday, 4th week, Advent |
01045000 | 1 |
| Adv., hebd. 4, fer. 6 | Friday, 4th week, Advent |
01046000 | 1 |
| Adv., hebd. 4, sabbato | Saturday, 4th week, Advent |
01047000 | 16 |
| Adventus, dom. 1 | 1st Sunday of Advent |
01011000 | 367 |
| Adventus, dom. 2 | 2nd Sunday of Advent |
01021000 | 212 |
| Adventus, dom. 3 | 3rd Sunday of Advent |
01031000 | 254 |
| Adventus, dom. 4 | 4th Sunday of Advent |
01041000 | 212 |
| Aegidii | Aegidius (Giles), Abbot |
14090100 | 5 |
| Agapiti | Agapitus, Martyr |
14081800 | 20 |
| Agathae | Agatha, Virgin and Martyr |
14020500 | 262 |
| Agnetis | Agnes, Virgin and Martyr |
14012100 | 322 |
| Agnetis, oct. | Octave of Agnes |
14012108 | 17 |