SaintsApril 4On April 4, the Church celebrates Saint Isidore, Bishop and Doctor of the Church (optional memorial).optional memorialSaint Isidore, Bishop and Doctor of the ChurchMore saints for this dayIsidore of SevilleBenedict the MoorFrancisco MartoZosimas of PalestineGiuseppe Benedetto DusmetGaetano CatanosoPlato of SakkoudionPeter of PoitiersMaurus Xaverius HerbstGuglielmo BuccheriAlètheTigernach of ClonesKarl SerreqiJan z NeapoluPierre IITyrnogPlatónAmbrosinien