Holy Martyrs Justus and Matthew.
Sts. Justus and Matthew are commemorated together as martyrs who confessed Christ during the persecutions of the early Church. Tradition relates that they died by the sword.
Their names are preserved in the Synaxarion.
Feast day
On the New Calendar, Justus and Matthew is commemorated on July 21. Churches on the Old (Julian) Calendar keep the feast on August 3 of the civil calendar.
Also commemorated on July 21

Symeon the Fool for Christ
Venerable, Συμεών ο Σαλός
Venerable Symeon the Holy Fool for Christ.
Name days: Simeon
Parthenios of Radovisdion
Hierarch, Παρθένιος Ραδοβυσδίου
St. Parthenios, Bishop of Radovisdion in Epirus.
Theophilos, Trophimos and Thirteen Martyrs
Martyr, Θεόφιλος και Τρόφιμος
Holy Martyrs Theophilos, Trophimos and thirteen others who suffered in Lycia.
Onouphrios the Silent
Venerable, Ονούφριος ο Σιωπηλός
Venerable Onouphrios the Silent of the Kiev Caves.