Saint Casimir, son of the King of Poland, a prince exceptional for his zeal for the faith, chastity, penance, generosity towards the poor, and devotion to the Holy Eucharist and the Blessed Virgin Mary. While still young, he became a victim of tuberculosis and rested in the grace of the Lord in the city of Grodno (then in Lithuania, now in Belarus). († 1484)

In Nicomedia (now İzmit, Türkiye), Saints Photius, Archelaus, Quirinus, and seventeen others, martyrs. († 3rd/4th cent.)

* In Trier (Germany), Saint Basinus, bishop. Descending from the dukes of the kingdom of Austrasia, he was first a monk, then abbot of Saint Maximin in Trier. Raised to the episcopal see of this city, he approved the foundation of the monastery of Saint Irmina in Echternach (Luxembourg). († 705)

* In Comacchio (Italy), Saint Appian, monk. Coming from the monastery of Pavia, he followed the eremitical life in this city. († 8th cent.)

* At the monastery of Cava, in Cava de’ Tirreni (Italy), Saint Pietro I, who, after following the monastic life from his youth, was elected Bishop of Policastro. Tired of the frenetic activity of the world, he returned to monastery where he became abbot and admirably restored religious observance. († 1123)

* In Chambéry (France), Blessed Humbert (or Umberto), third Count of Savoy, who, compelled to leave the cloister to attend to public affairs, diligently practiced the monastic life, to which he later returned. († 1188)

* In London (England), the Blessed martyrs Christopher Bales, diocesan priest, and Alexandre Blake and Nicholas Horner, laypersons, who, during the persecution of Queen Elizabeth I, received together the crown of glory. († 1590)

* In Vannes (France), Blessed Marie-Louise-Élisabeth de Lamoignon, who, after losing her husband, guillotined during the French Revolution, renewed her pact with the cross of Christ, and founded the Congregation of the Sisters of Charity of Saint Louis to educate children in the path of virtues. († 1825)

* At the monastery of Saint-Sauveur-le-Vicomte (France), Blessed Placide (Eulalie) Viel, virgin, who excelled through her zeal and humility in the government of the Congregation of the Sisters of the Christian Schools of Mercy [now known as the Congregation of Saint Marie-Madeleine Postel]. († 1877)

In Vicenza (Italy), Saint Giovanni Antonio Farina, bishop, who engaged himself in various means of pastoral action and founded the Institute of the Teaching Sisters of Saint Dorothy, Daughters of the Sacred Hearts, to provide for the education of young girls and all the oppressed and marginalized. († 1888)

* In Berezovichi (then in Poland, now in Belarus), Blesseds Mieczysław Bohatkiewicz, Władysław Maćkowiak, and Stanisław Pyrtek, diocesan priests and martyrs, who, during the Second World War, were locked up in prison and shot because of their faith in Christ. († 1942)

* In Kistarcsa (Hungary), Blessed Zoltán Lajos Meszlényi, Auxiliary Bishop of Esztergom-Budapest and martyr, who, condemned to solitary confinement by a regime hostile to the Christian faith, obtained the crown of martyrdom after eight months of starvation, forced labor, and unspeakable violence and torture. († 1951)