Holy Prophet Jonah, who preached repentance to Nineveh.
The holy Prophet Jonah, son of Amittai, was sent by God to preach repentance to Nineveh. Fleeing his commission by sea, he was cast overboard and swallowed by a great fish, and after three days was delivered to complete his mission, at which the whole city repented in sackcloth.
The Lord Himself named the sign of Jonah as a figure of His own three days in the tomb. The prophet is commemorated on September 21.
Feast day
On the New Calendar, Jonah the Prophet is commemorated on September 21. Churches on the Old (Julian) Calendar keep the feast on October 4 of the civil calendar.
Who celebrates a name day
People with these names keep their name day on this feast:
Also commemorated on September 21

Jonah the Sabbaite
Venerable, Ιωνάς ο Σαβαΐτης
Venerable Jonah the Presbyter of the Lavra of St. Sabbas, father of Sts. Theophanes and Theodore Graptoi.
Eusebios, Nestabos, Zeno and those with them
Martyr, Ευσέβιος, Νέσταβος και Ζήνων
Holy Martyrs Eusebios, Nestabos and Zeno, brothers of Gaza, with Nestor and Bousiris.
Platon Aivazidis
Hierarch, Πλάτων Αϊβαζίδης
Hieromartyr Platon Aivazidis, archimandrite of Amisos, martyred in 1921.