 The traditional Western commemoration of Onesimus is on 16 February.But in the 2004 edition of the "Roman Martyrology", Onesimus is listed under 15 February.There, he is described as "[a] runaway slave, whom the apostle Paul received to the faith of Christ while in prison, regarding him as a son of whom he had become father, as he himself wrote to Philemon, Onesimus's master".