| Acisclus (Saint —) |
| Agatha (Saint —) |
| Agnes (Saint —) |
| Albinus of Angers (Saint —) |
| Albinus of Châlons (Saint —) |
| Alexander (Saint —) |
| All Saints (Day) |
| Ambrose (Saint —) |
| Anaclet (Saint —) |
| Anatolius (Saint —) |
| Andrew (Saint —) |
| Anne (Saint —) |
| Annunciation (The —) |
| Ansanus (Saint —) |
| Anthony of Padua (Saint —) |
| Anthony the Abbot (Saint —) |
| Antoinette (Saint —) |
| Antoninus (Saint —) [San Antolín] |
| Antoninus (Saint —) [Sant'Antonino] |
| Apollinaris of Ravenna (Saint —) |