Saint Euthymios the Wonderworker, Bishop of Madytos in Thrace.
Euthymios was bishop of Madytos on the Thracian shore of the Hellespont, traditionally placed in the tenth century. He was renowned for his charity and for the wonders worked through his prayers both in life and after his death.
His relics were treasured in Madytos and he is remembered on May 5.
Feast day
On the New Calendar, Euthymios of Madytos is commemorated on May 5. Churches on the Old (Julian) Calendar keep the feast on May 18 of the civil calendar.
Also commemorated on May 5

Ephraim of Nea Makri
Martyr, Εφραίμ ο Μεγαλομάρτυς
Great Martyr Ephraim the Wonderworker of Nea Makri, monk of Mount Amomon martyred by the Turks.
Irenaeus, Irene and Peregrinus of Thessalonica
Martyr, Ειρηναίος, Ειρήνη και Περεγρίνος
Holy Martyrs Irenaeus, Irene and Peregrinus, who suffered at Thessalonica.
Neophytos, Gaius and Gaianos
Martyr, Νεόφυτος, Γάιος και Γαϊανός
Holy Martyrs Neophytos, Gaius and Gaianos.
Martha of Monemvasia
Holy Woman, Μάρθα Μονεμβασίας
Venerable Martha of Monemvasia, a woman ascetic of the Peloponnese.