SaintsMay 18On May 18, the Church celebrates Saint John I, Pope and Martyr (optional memorial).Month of Maryoptional memorialSaint John I, Pope and MartyrMore saints for this dayTheodore IEric IX of SwedenStephen I of ConstantinopleFelix of CantaliceGuadalupe Ortiz de LandázuriBlandine MertenVenantius of CamerinoVarvara SkvorchikhinskayaDioscorus of Alexandria