October 1 in Eastern Orthodox liturgical calendars is a feast day and a day of commemoration of saints and martyrs. Although some Orthodox churches use the Revised Julian Calendar and others use the traditional Julian calendar, the fixed commemorations for their respective October 1 are broadly the same, no matter which calendar is used.
The Protection of Our Most Holy Lady Theotokos and Ever-Virgin Mary, at the Blachernae church in Constantinople (911) (see also: October 28 - Greek Orthodox Church)
Saint Ananias of Damascus, Bishop and one of the Seventy Apostles (1st century)
Martyr Domninus of Thessalonica (4th century)
Ezana of Axum, king of Ethiopia (4th century).
King Mirian III of Iberia (c. 361) and Queen Nana of Mtskheta (c. 364) - Equals-of-the-Apostles, St. Abiathar of Mtskheta, and St. Sidonia, disciple of St. Nina (4th century)
Venerable Romanos the Melodist, "Sweet-singer" (c. 556)
Monk-Martyrs Michael, Abbot of Zovia Monastery near Sebaste, and 36 fathers with him (c. 790) (see also: October 2)
Venerable Melchizedek I, Catholicos-Patriarch of Georgia (c. 1030)
Saint Piatus of Tournai, he enlightened the areas around Tournai in Belgium and Chartres in France (c. 286)
Martyrs Verissimus, Maxima and Julia, in Portugal under Diocletian (c. 302)
Martyrs Aretas, and five-hundred-and-four other martyrs, at Rome.
Saint Aladius (Albaud), Bishop of Toul in France. (c. 520)
Saint Wasnulf (died c. 650), missionary in Condé-sur-l'Escaut in Hainaut, Austrasia.
Saint Bavo of Ghent, penitent and hermit, confessor and patron of Haarlem in the Netherlands (659)
Saint Dodo, Abbot of Wallers-en-Faigne (750)
Saint Fidharleus, restorer of the monastery of Rathin in Ireland (762)
Martyr-prince Mylor of Brittany (Melorius).