| Celebration | Name | Saint | Birth | Death |
|---|---|---|---|---|
| 1 of January | Almachius | Saint Almachius | 391 | |
| 2 of January | Adalard | Saint Adalard | 826 France | |
| 2 of January | Airaldus | Saint Airaldus | 1146 France | |
| 2 of January | Argeus | Saint Argeus martyr | Italy | |
| 3 of January | Anterus | Saint Anterus pope | 236 Italy | |
| 4 of January | Ángela | Saint Angela of Foligno | 1248 Italy | 1309 Italy |
| 4 of January | Abrunculus | Saint Abrunculus | 490 France | |
| 4 of January | Ángela | Blessed Angela widow | 1309 Italy | |
| 6 of January | Andrew | Saint Andrew Corsini | 1373 Italy | |
| 6 of January | Andrés | Blessed Andre Bessette | 1937 Canada | |
| 7 of January | Ambrosio | Blessed Ambrose Fernandez | 1620 Japan | |
| 7 of January | Alderic | Saint Alderic | 856 France | |
| 8 of January | Apollinaris | Saint Apollinaris | Turkey | |
| 8 of January | Albert | Saint Albert bishop | Ireland | |
| 9 of January | Águeda | Saint Águeda Yi Sosa | Korea, republic of | 1838 Korea, republic of |
| 9 of January | Antonio | Blessed Antonio Fatati | 1484 Italy | |
| 9 of January | Adrian | Saint Adrian abbot | 710 United kingdom | |
| 10 of January | Ana de los Ángeles | Blessed Anna of the Angels Monteagudo | 1686 Peru | |
| 10 of January | Archon | Saint Archon | 745 France | |
| 10 of January | Agathon | Saint Agathon pope | 681 Italy | |
| 12 of January | Arcadius | Saint Arcadius | 304 Algeria | |
| 12 of January | Antonio | Saint Antonio María Pucci | 1892 Italy | |
| 12 of January | Antonio | Blessed Antoine Fournier | 1794 France | |
| 13 of January | Agricius | Saint Agricius | 300 Germany | |
| 15 of January | Ángel | Blessed Angel hermit | 1325 Italy | |
| 15 of January | Arnold | Saint Arnold Janssen | 1837 Germany | 1909 Netherlands |
| 15 of January | Arsenius | Saint Arsenius hermit | 904 Italy | |
| 16 of January | Adjutus | Saint Adjutus | 1226 Morocco | |
| 16 of January | Accursius | Saint Accursius | 1226 Morocco | |
| 17 of January | Antonio | Anthony the Great | 251 | 356 Egypt |
| 18 of January | Andrés | Blessed Andrea de Peschiera Grego | 1485 Italy | |
| 19 of January | Abacus | Saint Abacus | Iran | 270 Iran |
| 19 of January | Arsenius | Saint Arsenius bishop | Greece | |
| 20 of January | Ascla | Saint Ascla of Antinoe | Egypt | |
| 22 of January | Antonio | Blessed Antonio della Chiesa | 1459 Italy | |
| 22 of January | Anastasius | Saint Anastasius monk and martyr | 628 Iran | |
| 23 of January | Amasius | Saint Amasius bishop | 356 Italy | |
| 23 of January | Andrew | Saint Andrew Chong Hwagyong | 1840 Korea, republic of | |
| 23 of January | Agathangelo | Saint Agathangelo | Turkey | |
| 23 of January | Aquila | Saint Aquila | Algeria | |
| 25 of January | Agileus | Saint Agileus | Tunisia | |
| 25 of January | Antonio | Blessed Antonio Migliorati | Italy | 1450 |
| 25 of January | Antonio | Blessed Antoni Swiadek | Germany | |
| 25 of January | Arcángela | Blessed Archangela (Leonor) Girlani | Italy | 1495 |
| 25 of January | Artemas | Saint Artemas | Italy | |
| 26 of January | Alberic | Saint Alberic abbot | 1109 France | |
| 26 of January | Augustine | Saint Augustine Erlandsön | 1188 Norway | |
| 27 of January | Ángela | Saint Angela of Merici | 1470 Italy | 1540 Italy |
| 27 of January | Avitus | Saint Avitus martyr | ||
| 28 of January | Amadeus | Saint Amadeus of Lausanne | 1110 France | 1159 Switzerland |
| 29 of January | Aphraates | Saint Aphraates | 378 Turkey | |
| 30 of January | Adelelmo | Saint Adelelmo of Burgos | 1097 Spain | |
| 30 of January | Armentaro | Saint Armentaro of Pavía | 731 Italy | |
| 30 of January | Aldegunda | Saint Aldegunda of Maubeuge | 684 France | |
| 1 of February | Andrés | Blessed Andrew Segni | 1302 Italy | |
| 1 of February | Agrippano | Saint Agrippano bishop and martyr | France | |
| 2 of February | Aproniano | Saint Aproniano martyr | ||
| 2 of February | Andrés | Blessed Andrea Carlo Ferrari | 1921 Italy | |
| 3 of February | Azarías | Saint Profeta Azarías | ||
| 3 of February | Adelinus | Saint Adelinus of Celle | 696 Germany | |
| 4 of February | Aventinus | Saint Aventinus of Troyes | 537 France | |
| 4 of February | Aventinus | Saint Aventinus of Chartres | 511 France | |
| 5 of February | Águeda | Saint Agatha | 251 Italy | |
| 5 of February | Adelaida | Saint Adelaida | 1015 Germany | |
| 5 of February | Albinus | Saint Albinus | 1006 Italy | |
| 5 of February | Avitus | Saint Avitus | 518 France | |
| 6 of February | Alfonso | Saint Alfonso María Fusco | 1910 Italy | |
| 6 of February | Angelo | Saint Angelo of Furcio | 1327 | |
| 6 of February | Anatolia | Saint Anatolia martyr | France | |
| 6 of February | Amand | Saint Amand of Elnon | 679 Belgium | |
| 7 of February | Antonio | Blessed Antonio Stronconio | 1461 Italy | |
| 7 of February | Adalberto | Blessed Adalbert Nierychlewski | 1942 Poland | |
| 9 of February | Apolonia | Saint Apollonia of Alexandria | 250 Egypt | |
| 9 of February | Alto | Saint Alto | Ireland | Germany |
| 9 of February | Ansbert | Saint Ansbert | 695 France | |
| 10 of February | Austreberta | Saint Austreberta | 704 France | |
| 11 of February | Ardanus | Saint Ardanus | 1066 France | |
| 12 of February | Anthony | Saint Anthony Kauleas | 901 Turkey | |
| 14 of February | Alejandra | Saint Alejandra of Egipto | Egypt | Egypt |
| 14 of February | Auxentius | Saint Auxentius | ||
| 14 of February | Antoninus | Saint Antoninus | 830 Italy | |
| 15 of February | Ángel | Blessed Angelo Scarpetti | 1306 Italy | |
| 17 of February | Alexis | Saint Alexis Falconieri and companions | 1310 | |
| 17 of February | Antonio | Blessed Antoni Leszczewicz | 1943 Poland | |
| 18 of February | Angilbert | Saint Angilbert abbot | 814 France | |
| 19 of February | Álvaro | Blessed Alvaro of Cordoba | 1360 Spain | 1430 Spain |
| 25 of February | Aldetrudis | Saint Aldetrudis | 526 Belgium | |
| 25 of February | Avertano | Blessed Avertano | 1386 Italy | |
| 26 of February | Alejandro | Saint Alexander | 250 Egypt | 326 Egypt |
| 26 of February | Agricola | Saint Agricola of Nevers | 594 France | |
| 26 of February | Andrew | Saint Andrew of Florence | 9 Italy | |
| 27 of February | Ana | Saints Ana Line y compañeros | 1601 United kingdom | |
| 28 of February | Antonia | Blessed Antonia of Florence | 1472 Italy | |
| 1 of March | Augustus | Saint Augustus Chapdelaine | France | 1856 China |
| 1 of March | Aubin | Saint Aubin of Anjou | 550 France | |
| 2 of March | Absalon | Saint Absalon | ||
| 3 of March | Artelaides | Saint Artelaides | 570 Italy | |
| 3 of March | Asterius | Saint Asterius, senator and martyr | 260 Israel | |
| 3 of March | Anselm | Saint Anselm of Nonántola | 803 Italy | |
| 4 of March | Appian | Saint Appian | Italy |