His feast is celebrated on the 3rd of Pashons in the Coptic Orthodox Church and in eastern Christian traditions he is commemorated on 4 January among the Seventy Apostles.
Some Thessalonian Jews were annoyed with Paul's remarks in their synagogue and so, not finding him and Silas, they dragged Jason and some of the other Christian disciples before the city authorities, where he was fined and released.
The literary source (hagiographic legend) of the life of Jason and Sosipater was newly edited and translated by B. Kindt as appendix to "La version longue du récit légendaire de l'évangelisation de Corfou par les saints Jason and Sosipatre", Analecta Bollandiana 116 (1998) 259–295.
The king's daughter, the virgin Cercyra, having watched these holy apostles being tortured, turned to the Christian faith and distributed all her jewels to the poor.
From then on Sosipater and Jason freely preached the Gospel and built up the Church in Corfu until a very old age, when they gave up their souls to God.