April 1

• Cantius, Cantianus, Cantianilla, martyrs (Advent) [GTZ: Hildesheim]
• Donatus, martyr [GTZ: Bremen]
• Ferreolus, bishop (of Uzès), confessor (Translation) [GTZ: Uzès]
• Francis de Paola, hermit [MR]
• Gilbert, bishop (of Caithness), confessor [BLS; GTZ: Scotland]
• Hugh, bishop (of Grenoble), confessor [BLS; GTZ: southern France, Carthusians]
• Mary Magdalene (Conversion) [GTZ: Salzburg]
• Melito, bishop (of Sardes), confessor [BLS]
• Pontius, martyr [WTS (Bruges)]
• Theodora, virgin, martyr [GTZ]
• Valeric, abbot, bishop (in Auvergne), confessor (Translation) [GTZ: Amiens; HCC; PCP (Paris)]

April 2

• Apian, martyr [BLS]
• Bronacha [BLS: Kill-Broncha]
• Constantius, king (of Scotland) [BLS]
• Ebba, and companions, virgins, martyrs [BLS]
• Francis de Paola, confessor [common]
• Guthlac [PRI: England]
• John Payne, priest, martyr [BLS]
• Mary (of Egypt) [GTZ: Gnesen, Strassburg, France, one or more religious orders; PCP (Paris)]
• Nicetius, bishop (of Lyon), confessor [BLS; GTZ: Lyon]
• Nychasius, bishop [HCC]
• Theodosia, virgin, martyr [BLS]

April 3

• Agape, Chionia, Irene, and companions, martyrs [BLS]
• Florentius, bishop (of Strassburg) (Translation) [GTZ: Strassburg, Basel]
• Nicetas, abbot [BLS]
• Pancratius, martyr [PCP (Paris); WTS (Bruges)]
• Richard, bishop (of Chichester), confessor [BLS; GTZ: England; PRI: England]
• Ulpian, martyr [BLS]

April 4

• Ambrose, bishop, confessor [common]
• Claudius, martyr [GTZ: Russia]
• Isidore, bishop (of Seville), confessor, Doctor of the Church [common; GTZ: Spain, Sens]
• Plato, abbot [BLS]

April 5

• Agape and companions, virgins [GTZ: Aquileia]
• Beccan, confessor [BLS: Ireland]
• Claudian, martyr (somtimes only confessor) [HCC; WTS (Bruges)]
• Gerald, abbot (of Suauve) [BLS; GTZ: Limoges]
• Irene, martyr [PCP (Paris)]
• Tigernach, bishop, confessor [BLS]
• Vincent Ferrer (de Valencia), priest, confessor [common; GTZ: Dominicans]

April 6

• Celestine, pope [common]
• Celsus McAedh, bishop (of Armagh) [BLS]
• One Hundred and Twenty Martyrs of Hadiab [BLS]
• Prudentius, bishop (of Troyes) [BLS; GTZ: Troyes]
• Sixtus (I), pope, martyr [BLS]
• Timothy [PCP (Paris)]
• William, abbot (of Eskille) [BLS]
• Winebald, abbot (at Troyes), confessor [GTZ: Troyes]

April 7

• Aibert [BLS]
• Aphraates, anchoret [BLS]
• Celestine, pope [GTZ]
• Finian [BLS]
• Hegesippus, confessor [BLS; GTZ: Utrecht]
• Herman Joseph, confessor [BLS]
• Jean Baptiste de la Salle, priest [MR]
• Macarius [PCP (Paris)]
• Sixtus, pope [WTS (Bruges)]

April 8

• Aedicius [BLS]
• Albert, bishop (of Jerusalem) [BLS]
• Apollinaris [PCP (Paris)]
• Callistus, pope [WTS (Bruges)]
• Celestine, pope [GTZ; HCC]
• Dionysius (of Corinth), bishop, confessor [BLS]
• Maximinus, bishop (of Aix), confessor (Translation) [GTZ: Aix]
• Perpetuus, bishop (of Tours) [BLS]
• Walter, abbot (of St. Martin's near Pontoise) [BLS]

April 9

• Dotto [BLS]
• Eupsychius, martyr [BLS]
• Fridestan, bishop [GTZ: Winchester]
• Gaucher, abbot [BLS]
• Hugh, bishop (of Rouen), confessor [GTZ: Rouen]
• Mary (of Egypt) [common]
• Massylitan Martyrs [BLS]
• Monica, widow (Translation) [GTZ: Augustinians]
• Prochorus [PCP (Paris)]
• Roman Captives in Persia, martyrs [BLS]
• Seven Virgins, martyrs [GTZ: Basel, Amiens]
• Theodosia, virgin [WTS (Bruges)]
• Waltrude, matron [BLS; GTZ: Mons (Transitus)]
• Zosimus [BLS]

April 10

• Appollonius, priest [HCC]
• Bademus, abbot, martyr [BLS]
• Ezekiel, prophet [WTS (Bruges)]
• Mechtildes, abbess [BLS]
• Palladius, bishop (of Auxerre) [GTZ: Auxerre]
• Godobert, bishop (of Angers) [PCP (Paris), as Profer]

April 11

• Aedh, abbot [BLS]
• Antipas, martyr [BLS]
• Godeberta, virgin [GTZ: Noyon]
• Guthlac, hermit, confessor [BLS: Abbey of Croyland; GTZ: England]
• Isaac, monk, confessor [GTZ: Bamberg]
• Leo (I, the Great), pope, confessor [common]
• Maccai, abbot [BLS]
• Stanislas, bishop, martyr [MR; GTZ: Krakow (Death)]

April 12

• Constantine, bishop (of Gap), confessor [GTZ: Gap]
• Erkenbodo, bishop (of Thérouanne), confessor [GTZ: Thérouanne]
• Julius, pope [BLS; WTS (Bruges), as bishop]
• Marcellus [PCP (Paris), as Marcel]
• Odilo, abbot, confessor [GTZ: Chartres]
• Sabas (the Goth), martyr [BLS]
• Tetricus, bishop (of Auxerre) [GTZ: Auxerre]
• Victor (of Braga) [BLS]
• Zeno, bishop (of Verona), confessor [BLS; GTZ: Salzburg]

April 13

• Caradoc, priest, hermit [BLS]
• Eufemia, virgin, martyr [GTZ: (not everywhere); HCC; PCP (Paris)]
• Eusebius (Eusebia), virgin [WTS (Bruges)]
• Hermenegild, martyr [BLS; PRI: England]
• Guinoch [BLS]
• Martin (I), pope, martyr [MR]
• Valerianus [PCP (Paris)]

April 14

• Anthony, John, and Euatachius, martyrs [BLS]
• Benezet [BLS: Avignon]
• Carpus, bishop (of Thyatira), Papylas, deacon, and Agathodorus, martyrs [BLS]
• Euphemia [PCP (Paris)]
• Justin Martyr [BLS]
• Ledwina, virgin [BLS]
• Tiburtius, Valerian, and Maximus, martyrs [common; HCC, without Maximus; PCP (Paris), as Valerien]

April 15

• Basilissa and Anastasia, martyrs [BLS]
• Helena, queen [GTZ: Salzburg, Five Churches; HCC]
• Invelta, virgin [GTZ: St. Pol de Léon]
• Munde, abbot [BLS]
• Olimpiadis, virgin, martyr [WTS (Bruges)]
• Paternus, bishop (of Avranches) [BLS]
• Peter Gonzales (Telm, Elm), confessor [BLS]
• Primus [PCP (Paris)]
• Ruadhan, abbot [BLS]

April 16

• Anicetus [PCP (Paris), as Anacletus]
• Benedict Joseph Labre, confessor [BLS]
• Callistus, pope, (and companions), martyrs [GTZ: Mainz; HCC]
• Drogo, recluse, confessor [BLS]
• Eighteen Martyrs of Saragossa [BLS]
• Engratia, virgin, martyr (at Saragossa) [BLS; GTZ: Auch, Spain]
• Fructuosis, bishop (of Braga) [BLS]
• Isidore, martyr [GTZ: one or more religious orders]
• Joachim (of Siena) [BLS]
• Magnus, earl (of the Orkneys), martyr [common]
• Paternus, bishop (of Vannes), martyr [GTZ: Vannes]
• Turibius, bishop (of Astorga) [BLS]
• Turibius, bishop (of LeMans) [GTZ: LeMans]
• Vasius, bishop (of Saintes), martyr [GTZ: Saintes]

April 17

• Anicetus, pope, martyr [common]
• Donanus, abbot [GTZ: Scotland]
• Henry Heath [BLS]
• Leonidas [PCP (Paris)]
• Peter, confessor [HCC; WTS (Bruges), as deacon]
• Simeon, bishop (of Ctesiphon), and companions, martyrs [BLS]
• Stephen Harding, abbot (of Citeaux), confessor [BLS]

April 18

• Apollonius (the Apologist), martyr [BLS]
• Eleutherius, bishop, and Ancia, his mother, martyrs [GTZ: Magdeburg, Ratzeburg, southern France]
• Galdin, bishop (of Milan) [BLS]
• Laserian, bishop (of Leighlin, Ireland) [BLS]
• Mappalicus (Mapolice) [PCP (Paris)]
• Marie de l'Incarnation, virgin [BLS]
• Perfectus, martyr [GTZ: Paris]
• Renatus, bishop (of Angers) (Translation) [GTZ: Angers]
• Ursmar, bishop, confessor [GTZ: Liège, Cambrai]

April 19

• Anthony, martyr [HCC]
• Carissimus and Dulcissimus, martyrs [GTZ: Bamberg]
• Eleutherius, bishop [WTS (Bruges)]
• Elphege, bishop (of Canterbury), martyr [BLS; GTZ: England; PRI: England]
• James Duckett, martyr [BLS]
• Kanute, king, martyr (Translation) [GTZ: Odense]
• Leo (IX), pope, confessor [common]
• Perfectus [PCP (Paris), as Profert]
• Ursmar, bishop, confessor [BLS]

April 20

• Adalar, bishop, martyr [GTZ: Mainz]
• Agapitus, martyr (Invention (of his head) [GTZ: Besançon]
• Agnes (of Montepulciano), virgin, abbess [BLS]
• Apollinus, martyr [WTS (Bruges)]
• James (of Scavonia) [BLS]
• Mamertinus and Marianus, martyrs [GTZ: Auxerre]
• Marcellinus, bishop (of Embrun), confessor [GTZ: southern France]
• Senesius, martyr [GTZ: Augsburg]
• Serf, bishop (of Orkney) [BLS]
• Soter [PCP (Paris), as Gobert]
• Thomas Tichborne, martyr [BLS]
• Victor, bishop, martyr [GTZ: Bremen, Krakow, Regensburg, Strassburg]

April 21

• Anastasius, bishop (of Antioch) [BLS]
• Anastasius the Sinaite, anchoret [BLS]
• Anastasius the Younger, bishop (of Antioch), martyr [BLS]
• Anselm, bishop (of Canterbury), confessor, Doctor of the Church [common; PRI: England]
• Beuno, abbot (of Clynnog, Carnarvonshire) [BLS]
• Eingan, king (of the Scots) [BLS]
• Malrubius, martyr [BLS]
• Marcellus, bishop [WTS (Bruges)]
• Victor [PCP (Paris)]
• William, confessor [GTZ: Cluniacs]

April 22

• Aprunculus, bishop (of Trier) [GTZ: Trier]
• Azades, Tharba, and companions, martyrs [BLS]
• Caius, pope, martyr [common]
• Dionysius (sometimes bishop or pope) and companions (Rusticus, Eleuterius), martyrs (Invention) [GTZ: Augsburg, France; PCP (Paris)]
• Epipodius and Alexander, martyrs [BLS]
• Formatus, bishop, martyr [WTS (Bruges)]
• Fortunatus, martyr [WTS (Bruges)]
• Ipipodius, martyr [GTZ: Lyon]
• Leo, bishop (of Sens), confessor [GTZ: Sens]
• Leonides, martyr [BLS]
• Opportuna, virgin, abbess (of Montreuil) [BLS; GTZ: Genf, Angers, Paris, Séez; PCP (Paris)]
• Rufus, anchoret [BLS]
• Soter, pope, martyr [BLS; GTZ: one or more religious orders; PRI]
• Theodore (of Siceon), bishop [BLS]

April 23

• Adalbert, bishop (of Prague), martyr [common]
• Felix, Fortunatus and Achilleus, martyrs (at Valence) [GTZ: southern France]
• George, martyr [common; WTS (Bruges), 6082, in red]
• Gerard, bishop (of Toul) [common]
• Ibar (McLugni), bishop (of Beg Erin) [BLS]
• John, bishop (of Holar), confessor [GTZ]
• Pusinna, virgin [GTZ: Minden]
• Regulus, bishop (of Senlis), confessor [GTZ: France]

April 24

• Adalbert, bishop (of Prague), martyr [GTZ: Salzburg, Augsburg, Eichstädt]
• Alexander and companions, martyrs [GTZ: Lyon]
• Bova and Doda, virgins [BLS; GTZ: Reims]
• Dismas (the Good Thief) [BLS]
• Egbert, priest [PRI: England]
• Eutropis, martyr [WTS (Bruges)]
• Fidelis (of Sigmarengen) [common]
• George, martyr [GTZ: Aquileia, Augsburg, Salzburg, Gnesen, Prague, northern Italy, Hungary]
• Ludger, bishop (of Münster), confessor (Deposition) [GTZ: Münster]
• Mellitus, bishop (of Canterbury), confessor [BLS; PRI: England]
• Norbert, bishop (of Magdeburg), confessor (Translation) [GTZ: Praemonstrensians]
• Robert, abbot (of Chaise-Dieu, Auvergne), confessor [BLS; GTZ: Cluniacs, southern France; PCP (Paris)]
• Shadrach, Meschach, and Abednego [HCC]
• Victoria, virgin [GTZ: Apt]
• Wendelin, confessor [GTZ: Mainz]
• Wilfrid, bishop (of York), confessor (Translation) [GTZ: York]

April 25

• Anianus, bishop (of Alexandria) [BLS]
• Floribert, bishop, confessor [GTZ: Liège]
• George, martyr [GTZ: Chur]
• Ivo, bishop [BLS]
• Kebius, bishop [BLS]
• Macull [BLS: Ireland]
• Mark, evangelist, martyr [common]
• Phaebadius, bishop (of Agen) [BLS]
• Rusticus, bishop (of Lyon), confessor [GTZ: Lyon]

April 26

• Benignus, martyr (at Dijon) (Translation) [GTZ: Langres]
• Cletus and Marcellinus, popes, martyrs [common; GTZ: Mainz; HCC, PCP (Paris), without Marcellinus]
• Pascharius Radbert, abbot [BLS]
• Peter Canisius, Doctor of the Church [BLS]
• Richarius, abbot [BLS]
• Trudpert, martyr [GTZ: Salzburg]

April 27

• Alpinianus, priest [GTZ: Limoges]
• Anastasius, pope, martyr [common; GTZ: Worms]
• Anthimus, bishop, and companions, martyrs [BLS]
• Egbert [BLS]
• Gaudius, martyr [GTZ: Aix]
• Germanus, bishop, confessor [GTZ: Agram]
• Zita, virgin [BLS]

April 28

• Aphrodisius, bishop (of Béziers) and companions, martyrs [GTZ: Narbonne]
• Artemius, bishop (of Sens), confessor [GTZ: Sens]
• Cronan, abbot (of Roscrea, Ireland) [BLS]
• Didymus and Theodora, martyrs [BLS]
• Lambert, bishop, martyr (Translation (Commemoration)) [GTZ: Liège]
• Liborius, bishop (of LeMans), confessor (Translation) [GTZ: Paderborn, LeMans]
• Louis Marie Grignon de Montfort, confessor [BLS]
• Pamphilus, bishop, confessor (sometimes martyr) [GTZ: Magdeburg, Kammin]
• Patricius, bishop (of Prusa, Bithynia), martyr [BLS]
• Peter Chanel, priest, martyr [MR]
• Pollio, lector, and companions, martyrs [BLS]
• Vitalis, martyr [common; GTZ: Magdeburg (with Pamphilus)]

April 29

• Catherine (of Siena), virgin, Doctor of the Church [MR]
• Edmund, king, martyr (Translation) [GTZ: England]
• Euphrosius(?) [6082]
• Fiachna, monk [BLS]
• Frontasius, martyr [GTZ: Limoges]
• Germana [PCP (Paris), as Germanus]
• Hoildis, virgin (at Troyes) [GTZ: Troyes]
• Hugh, abbot (of Cluny), confessor [BLS; GTZ: Cistercians, Cluniacs]
• Peter Martyr (of Milan), martyr [BLS; GTZ: Dominicans; HCC; PCP (Paris)]
• Robert (Gruthuysen), abbot (of Molesme), confessor [BLS; GTZ: Cistercians]

April 30

• Ajutre, recluse [BLS]
• Catherine (of Siena), virgin [BLS; GTZ: Dominicans]
• Desideratus, priest [GTZ: Chalon-sur-Saône]
• Erconwald, bishop (of London), confessor [BLS; GTZ: England; PRI: England]
• Eutropius, bishop (of Saintes), martyr [GTZ: Metz, France; PCP (Paris)]
• Fronto, bishop (of Périgueux), confessor (Invention) [GTZ: Limoges]
• Germanus, bishop [WTS (Bruges)]
• James, (the Great), apostle [GTZ: Russia only]
• James, Marian, and companions, martyrs [BLS]
• Maxentia (mother of Vigilius), widow [GTZ: Trent]
• Maximus, martyr [BLS]
• Pius (V), pope [MR]
• Quirinus, martyr [GTZ: Cologne, Mainz, Trier, Basel, Reims]
• Sophia, virgin, martyr [BLS; HCC]

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