April

2. Francis of Paola, hermit

4. Isidore, bishop and doctor
5. Vincent Ferrer, priest

7. John Baptist de la Salle, priest

11. Stanislaus, bishop and martyr

13. Martin I, pope and martyr

21. Anselm, bishop and doctor

23. George, martyr
24. Fidelis of Sigmaringen, priest and martyr
25. Mark, Evangelist

28. Peter Chanel, priest and martyr
29. Catherine of Siena, virgin and doctor
30. Pius V, pope