Synaxis of the holy men and women named as fellow-laborers of the Apostle Paul in his epistles.
The Apostle Paul closes many of his letters by greeting those who labored with him in the Gospel: Priscilla and Aquila, Epainetos, Urbanus, Apelles, Tryphaina and Tryphosa, Persis, Epaphras, Onesiphoros and many others. The Church honors them together as the first fellow-workers in the spread of the faith.
Their synaxis is kept on May 31.
Feast day
On the New Calendar, Co-workers of the Apostle Paul is commemorated on May 31. Churches on the Old (Julian) Calendar keep the feast on June 13 of the civil calendar.
Also commemorated on May 31

Eusebios and Charalambos
Martyr, Ευσέβιος και Χαράλαμπος
Holy Martyrs Eusebios and Charalambos, burned for their faith.
Eustathios of Constantinople
Hierarch, Ευστάθιος Κωνσταντινουπόλεως
Saint Eustathios, Patriarch of Constantinople.
Petronilla of Rome
Holy Woman, Πετρονίλα
Saint Petronilla, virgin of Rome, honored as a spiritual daughter of the Apostle Peter.
Name days: Petronilla
Five Martyrs of Ascalon
Martyr, Πέντε Μάρτυρες εν Ασκάλωνι
The Five Holy Martyrs who suffered at Ascalon in Palestine.
Hierotheos the New
Hierarch, Ιερόθεος ο Νέος
Hieromartyr Hierotheos the New, who suffered under the Turks.