Day | Saints | Country | Year |
| April 1 |
| Saint Wiho, bishop |  Germany | 809 |
| Saint Hughes de Châteauneuf, bishop |  France | 1132 |
| Saint Gilbert de Moravia, bishop |  Scotland | 1245 |
| Blessed John Bretton, layperson |  England | 1598 |
| Blessed Zofia Czeska-Maciejowska, religious |  Poland | 1650 |
| Saint Lodovico Tomaz Maria Pavoni, priest |  Italy | 1849 |
| Blessed Iosephus (or Petrus) Yun Bong-mun (윤봉문 요셉 (베드로) / 尹鳳文), layperson |  South Korea | 1888 |
| Blessed Charles of Austria (Karl von Österreich), layperson |  Portugal | 1922 |
| Blessed Anacleto González Flores, layperson |  Mexico | 1927 |
| Blessed Jorge Vargas González, layperson | Mexico | 1927 |
| Blessed Luis Padilla Gómez, layperson | Mexico | 1927 |
| Blessed Ramón Vargas González, layperson | Mexico | 1927 |
| Blessed Giuseppe Girotti, priest | Germany | 1945 |
| April 2 |
| Saint Theodosia of Tyre, layperson |  Israel | 307 |
| Saint Mary of Egypt, religious |  Palestine | 421 |
| Saint Giovanni di Napoli, bishop | Italy | 432 |
| Saint Vittore di Capua, bishop | Italy | 554 |
| Saint Nizier de Lyon, archbishop | France | 573 |
| Saint Eustache de Luxeuil, abbot | France | 629 |
| Saint Francis of Paola (Francesco di Paola), religious | France | 1507 |
| Saint John Payne, priest | England | 1582 |
| Blessed Richard Sergeant, priest | England | 1586 |
| Blessed Diego Luis de San Vitores y Alonso, priest |  Guam | 1672 |
| Saint Pedro Calungsod, layperson | Guam | 1672 |
| Blessed Leopoldo da Gaiche (Giovanni Croci), priest | Italy | 1815 |
| Saint Ðaminh Tước, priest |  Vietnam | 1839 |
| Blessed Elisabetta Vendramini, religious | Italy | 1860 |
| Saint Francisco Coll y Guitart, priest |  Spain | 1875 |
| Blessed Vilmos Apor, bishop |  Hungary | 1945 |
| Blessed Mykolai Charnets’kyi (Миколай Чарнецький), bishop |  Ukraine | 1959 |
| Blessed María de San José (Laura Evangelista Alvarado Cardozo), religious |  Venezuela | 1967 |
| Saint John Paul II, pope | Poland | 2005 |
| April 3 |
| Saint Guthlac of Crowland, religious | England | 714 |
| Saint Joseph the Hymnographer, priest |  Greece | 886 |
| Saint Richard de la Wich, bishop | England | 1253 |
| Blessed Gandolfo da Binasco Sacchi, priest | Italy | 1260 |
| Blessed Stephen Rowsham, priest | England | 1587 |
| Blessed Iacobus Won Si-bo (원시보 야고보), layperson | South Korea | 1799 |
| Blessed Laurentius Pak Chwi-deuk (박취득 라우렌시오 / 朴取得), layperson | South Korea | 1799 |
| Saint Luigi Scrosoppi, priest | Italy | 1884 |
| Blessed Ezequiel Huerta Gutiérrez, layperson | Mexico | 1927 |
| Blessed Salvador Huerta Gutiérrez, layperson | Mexico | 1927 |
| Blessed Francisco Solís Pedrajas, priest | Spain | 1937 |
| Blessed Juan de Jesús y María (Juan Otazua y Madariaga), priest | Spain | 1937 |
| Blessed Maria Teresa Casini, religious | Italy | 1937 |
| Blessed Piotr Edward Dańkowski, priest | Poland | 1942 |
| April 4 |
| Saint Ambrose (Ambrogio), archbishop | Italy | 397 |
| Saint Isidore of Seville (Isidoro), archbishop | Spain | 636 |
| Saint Pierre de Poitiers, bishop | France | 1115 |
| Blessed Guglielmo Cuffitelli, religious | Italy | 1404 |
| Saint Benedetto da San Fratello (Benedetto Manasseri), religious | Italy | 1589 |
| Blessed Giuseppe Benedetto Dusmet, cardinal | Italy | 1894 |
| Saint Francisco de Jesus Marto, layperson | Portugal | 1919 |
| Blessed Mario Ciceri, priest | Italy | 1945 |
| Blessed Karl (Ndue Serreqi), priest |  Albania | 1954 |
| Saint Gaetano Catanoso, priest | Italy | 1963 |
| April 5 |
| Saint Tigernach of Clogher, bishop |  Ireland | 549 |
| Saint Gérard de Corbie, abbot | France | 1095 |
| Saint Alberto di Montecorvino, bishop | Italy | 1127 |
| Saint Julienne du Mont-Cornillon (Julienne de Cornillon), religious |  Belgium | 1258 |
| Saint Vincent Ferrer (Vicente Ferrer), priest | France | 1419 |
| Saint Catalina Tomàs i Gallard, religious | Spain | 1574 |
| Saint Maria Crescentia (Anna Höss), religious | Germany | 1744 |
| Blessed Catalina de María (Josefina Saturnina Rodríguez de Zavalía), religious |  Argentina | 1896 |
| Blessed Mariano de la Mata Aparício, priest |  Brazil | 1983 |
| April 6 |
| Saint Methodius (Michael), archbishop |  Serbia | 885 |
| Blessed Notker, religious |  Switzerland | 912 |
| Saint Filarete di Calabria, abbot | Italy | 1070 |
| Saint William of Æbelholt, priest |  Denmark | 1203 |
| Saint Pietro da Verona (Pietro Rosini), priest | Italy | 1252 |
| Blessed Caterina Morigi, religious | Italy | 1478 |
| Saint Phaolô Lê Bảo Tịnh, priest | Vietnam | 1857 |
| Blessed Zefirino Agostini, priest | Italy | 1896 |
| Blessed Michele Rua, priest | Italy | 1910 |
| Blessed Enric Gispert Domènech, priest | Spain | 1937 |
| Blessed Josep Gomis Martorell, priest | Spain | 1937 |
| Blessed Pierina Morosini, layperson | Italy | 1957 |
| April 7 |
| Saint Aybert de Crespin, priest | France | 1140 |
| Saint Hermann Joseph von Steinfeld, priest | Germany | 1241 |
| Blessed Alexander Rawlins, priest | England | 1595 |
| Saint Henry Walpole, priest | England | 1595 |
| Blessed Edward Oldcorne, priest | England | 1607 |
| Blessed Ralph Ashley, religious | England | 1607 |
| Saint Jean-Baptiste de la Salle, priest | France | 1719 |
| Saint Phêrô Nguyễn Văn Lựu, priest | Vietnam | 1861 |
| Blessed Maria Assunta (Assunta Maria Pallotta / 亞松大), religious |  China | 1905 |
| April 8 |
| Saint Platon, priest |  Turkiye | 814 |
| Blessed Julián de San Agustín (Julián Martinet Gutiérrez), religious | Spain | 1606 |
| Blessed Augustinus Jeong Yak-jong (정약종 아우구스티노 / 丁若鍾), layperson | South Korea | 1801 |
| Blessed Franciscus Xaverius Hong Gyo-man (홍교만 프란치스코 하비에르 / 洪敎萬), layperson | South Korea | 1801 |
| Blessed Ioannes Choe Chang-hyeon (최창현 요한 / 崔昌顯), layperson | South Korea | 1801 |
| Blessed Lucas Hong Nak-min (홍낙민 루가 / 洪樂敏), layperson | South Korea | 1801 |
| Blessed Thomas Choe Pil-gong (최필공 토마스 / 崔必恭), layperson | South Korea | 1801 |
| Saint Julie Billiart, religious | Belgium | 1816 |
| Blessed August Franciszek Czartoryski, priest | Italy | 1893 |
| Blessed Domingo del Santísmo Sacramento (Domingo Iturrate Zubero), priest | Spain | 1927 |
| April 9 |
| Saint Waltrude de Mons, religious | Belgium | 688 |
| Saint Hugues de Rouen, bishop | France | 730 |
| Saint Gaucher d’Aureil, priest | France | 1140 |
| Blessed Clemente da Osimo, priest | Italy | 1291 |
| Blessed Ubaldo da Borgo San Sepolcro (Ubaldo Adimari), priest | Italy | 1315 |
| Blessed Tommaso da Tolentino, priest |  India | 1321 |
| Blessed Antonio Pavoni, priest | Italy | 1374 |
| Blessed Marguerite Rutan, religious | France | 1794 |
| Blessed Celestyna (Katarzyna Faron), religious | Poland | 1944 |
| Blessed Lindalva Justo de Oliveira, religious | Brazil | 1993 |
| April 10 |
| Saint Doimo, bishop |  Croatia | 304 |
| Saint Macarius of Armenia, layperson | Belgium | 1012 |
| Saint Fulbert de Chartres, bishop | France | 1028 |
| Blessed Antonio Neirotti, priest |  Tunisia | 1460 |
| Saint Michael de Sanctis (Miguel de los Santos / Miquel Argemir i Mitjà), priest | Spain | 1625 |
| Saint Magdalen of Canossa (Maddalena di Canossa), religious | Italy | 1835 |
| Blessed Bonifacy (Piotr Żukowski), religious | Germany | 1942 |
| Blessed Pedro María Ramírez Ramos, priest |  Colombia | 1948 |
