According to the 1962 Missal of Bl. John XXIII the Extraordinary Form of the Roman Rite, today is the feast of St. Casimir who was born in 1458 and was the son of the King of Poland. At an early age he saw through the superficiality and corruption of court life. Throughout his short life—he died of consumption at the age of 26—he dedicated himself wholly to the service of God and of his fellow-men. His love for the poor was immense. He was also renowned for his devotion to the Eucharist and to the Blessed Virgin. It is also the feast of St. Lucius I, pope in the 3rd century reputed to be a martyr.

St. Casimir

St. Casimir, to whom the Poles gave the title of "The Peace-maker," was the third of the thirteen children of Casimir IV, King of Poland, and of Elizabeth of Austria, daughter of the Emperor Albert II. ...Devout from his infancy, the boy gave himself up to devotion and penance, and had a horror of anything approaching softness or self-indulgence. His bed was often the ground, and he was wont to spend a great part of the night in prayer and meditation, chiefly on the passion of our Saviour. His clothes were plain, and under them he wore a hairshirt. Living always in the presence of God, he was invariably serene and cheerful, and pleasant to all. The saint's love of God showed itself in his love of the poor who are Christ's members, and for the relief of these the young prince gave all he possessed, using in their behalf the influence he had with his father and with his brother Ladislaus