Reading from the Synaxarion:

Sebastian the Martyr & his Companions

This Saint, who was from the city of Milan, was a member of the Senate as well as a zealot for the Faith of Christ, and had converted many to the knowledge of God. When Diocletian and Maximian began a Persecution against the Christians, Saint Sebastian was arrested and pierced with sharp arrows, and the bones of his body were shattered with clubs; and being cut into pieces, he gave up his spirit to God in the year 288. Together with him there were others also who died while enduring various tortures. Their names are Marcellinus and Mark the brethren, Tranquillinus their father, Nicostratus and his spouse Zoe, Tiburtius, Claudius, Castulus, and Castor.