St. John the Faster, Patriarch of Constantinople, renowned for his ascetic fasting.
St. John IV, called the Faster, was a goldsmith of Constantinople who embraced the monastic life and rose, against his own wishes, to the patriarchal throne in 582. He was famed for his extreme fasting, his almsgiving, and his gift of healing, and he composed canons of penance that were long used in the Church.
He reposed in 595, leaving nothing behind but a wooden bed, a coarse blanket and a threadbare cloak. He is commemorated on September 2.
Feast day
On the New Calendar, John the Faster of Constantinople is commemorated on September 2. Churches on the Old (Julian) Calendar keep the feast on September 15 of the civil calendar.
Also commemorated on September 2

Theodosius of the Kiev Caves
Venerable, Θεοδόσιος των Σπηλαίων
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Diomedes, Julian, Philip and those with them
Martyr, Διομήδης, Ιουλιανός, Φίλιππος
Holy Martyrs Diomedes, Julian, Philip, Eutychian, Hesychius, Leonides, Philadelphus, Melanippus and Parthagape.
Eleazar and Phinehas the Righteous
Saint, Ελεάζαρ και Φινεές
Righteous Eleazar and Phinehas, high priests of Israel, son and grandson of Aaron.
Kosmas the Hermit and Confessor
Venerable, Κοσμάς ο Ερημίτης
Venerable Kosmas the hermit and confessor.