Roman Martyrology, December 21st

This Day, the Twenty-First Day of December

At Calamina, the birthday of the blessed Apostle Thomas, who preached the Gospel to the Parthians, the Medes, the Persians and Hyrcanians. Having finally penetrated into India, and instructed those nations in the Christian religion, he died transpierced with lances by order of the king. His remains were first taken to the city of Edessa and then to Ortona.

In Tuscany, the holy martyrs John and Festus.

In Lycia, Saint Themistocles, martyr, who under the emperor Decius, offered himself in the place of Saint Dioscorus, who was sought after to be killed, and being racked, dragged about and beaten with rods, obtained the crown of martyrdom.

At Nicomedia, during the persecution of Diocletian, Saint Glycerins, a priest, who was subjected to many torments, and finally completed his martyrdom by being cast into the flames.

At Antioch, Saint Anastasius, bishop and martyr, who was cruelly murdered by the Jews during the reign of Phocas.

At Treves, Saint Severin, bishop and confessor.

And elsewhere in divers places, many other holy martyrs, confessors, and holy virgins.

V: All ye Holy Martyrs, pray for us
R: Thanks be to God

- Roman Martyrology, 1914, revised edition with the imprimatur of Cardinal James Gibbons