Holy Martyrs Hermes, Serapion and Polyainos of Rome.
The synaxaria record that Saints Hermes, Serapion and Polyainos confessed Christ at Rome and were dragged over rough ground until they died.
They are commemorated together on this day.
Feast day
On the New Calendar, Hermes, Serapion and Polyainos 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.
Juliana of Strobilos
Holy Woman, Ιουλιανή η εν Στροβίλω
Holy Martyr Juliana, who suffered near Strobilos.
George and John, Patriarchs of Constantinople
Hierarch, Γεώργιος και Ιωάννης Κωνσταντινουπόλεως
Saints George and John, Patriarchs of Constantinople in the seventh century.
Sophronios the Athonite
Venerable, Σωφρόνιος ο Αγιορείτης
Venerable Sophronios of the Skete of Saint Anne on Mount Athos.