November 12 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 November 12 are broadly the same, no matter which calendar is used.
Prophet Ahijah the Shilonite (Achias) (960 BC)
Martyr Arsacius (Arsakios), by the sword.
Martyrs Anthony, Zevinus, Germanus, Nicephorus and virgin-martyr Maratho, under Diocletian (c. 286–305) (see also: November 13)
Saint Martin of Terracina, Bishop of Terracina (c. 4th century) (see also: November 10)
Venerable Martin the Merciful (Martin of Tours), Bishop of Tours (397) (see also: October 12, November 11, July 4)
Venerable Nilus the Faster, of Sinai (451)
Saint John the Merciful, Patriarch of Alexandria (c. 616–620)
Saint Rufus of Avignon, venerated as the first Bishop of Avignon in France (c. 200)
Saint Renatus (René), Bishop of Angers in France, and by tradition of Sorrento in the south of Italy (c. 422)
Saint Evodius, Bishop of Le Puy in France (c. 560)
Saint Emilian of Cogolla, Hermit, of Vergegio in Spain (574)
Saint Machar (Macharius, Mochumna), Bishop of Aberdeen (6th century)
Saint Sinnell of Cleenish (Senilis), Ireland (6th century)
Saint Himerius (Imier), a hermit in the Jura in Switzerland, now called after him Immertal, Val-Saint-Imier (c. 610)
Saint Cummian Fada (Cumianus), a monk at Clonfert, who founded the monastery of Kilcummin (662)
Saint Cunibert, Bishop of Cologne in Germany, an untiring builder of churches and monasteries (c. 663)
Saint Cadwaladr (Catuvelladurus), King of the Welsh (664)