Commemoration of the Holy Fathers of the Sixth Ecumenical Council in Constantinople.
The Sixth Ecumenical Council met in Constantinople in 680 and 681 under the emperor Constantine IV. It condemned the Monothelite heresy, which taught that Christ had only one will, and confirmed that He has two natural wills and two energies, divine and human, without division or confusion.
The Holy Fathers of the Council are commemorated on September 14.
Feast day
On the New Calendar, Fathers of the Sixth Ecumenical Council is commemorated on September 14. Churches on the Old (Julian) Calendar keep the feast on September 27 of the civil calendar.
Also commemorated on September 14

Makarios the New of Thessaloniki
Martyr, Μακάριος ο Νέος
New Martyr Makarios of Thessaloniki, monk of Dionysiou and disciple of St. Niphon.
Gerasimos of Sourvia
Venerable, Γεράσιμος Σουρβιάς
Venerable Gerasimos, founder of the Monastery of the Holy Trinity of Sourvia on Pelion.