Saints George and John, Patriarchs of Constantinople in the seventh century.
Saints John and George were successive patriarchs of Constantinople in the reign of Constantine Pogonatos. George presided during the Sixth Ecumenical Council, which condemned the Monothelite heresy.
They reposed in peace and are commemorated together.
Feast day
On the New Calendar, George and John, Patriarchs of Constantinople is commemorated on August 18. Churches on the Old (Julian) Calendar keep the feast on August 31 of the civil calendar.
Also commemorated on August 18

Arsenios of Paros
Venerable, Αρσένιος ο εν Πάρω
Venerable Arsenios the New of Paros, remembered on the translation of his relics.
Hermes, Serapion and Polyainos
Martyr, Έρμος, Σεραπίων και Πολύαινος
Holy Martyrs Hermes, Serapion and Polyainos of Rome.
Juliana of Strobilos
Holy Woman, Ιουλιανή η εν Στροβίλω
Holy Martyr Juliana, who suffered near Strobilos.
Sophronios the Athonite
Venerable, Σωφρόνιος ο Αγιορείτης
Venerable Sophronios of the Skete of Saint Anne on Mount Athos.