April 9 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 April 9 are broadly the same, no matter which calendar is used.
Martyrs Fortunatus, Donatus, twelve virgins, and six laymen, at Sirmium (304)
Martyr Eupsychius of Caesarea in Cappadocia (362)
Hieromartyrs Desan the Bishop, the Priest Mariabus, Martyr Abdiesus and 270 others, martyrs of Persia under Shapur II (362)
Venerable Hieromartyr Bademus (Vadim), Archimandrite, of Persia, and 7 disciples (379)
Venerable Acacius of Amida, Bishop of Amida in Mesopotamia (5th century)
Martyrs of Pannonia, seven virgin-martyrs in Sirmium in Pannonia.
Martyrs of North-West Africa, a group of Christians martyred in Masyla.
Saint Marcellus, Bishop of Die, celebrated for miracles (474)
Saint Madrun (Materiana), a saint from Wales or Cornwall to whom some Welsh churches are dedicated (5th century)
Saint Dotto, Abbot of a monastery in the Orkney Islands off the coast of Scotland (6th century)
Saint Waltrude (Woutruide, Waldetrudis, Vaudru), monastic foundress at Bergen (Netherlands), renowned for holiness of life and miracles (688)
Saint Hugh of Rouen (Hugh of Champagne), Bishop of Rouen and then of Paris, and was also Abbot of Fontenelle and Jumièges (730)
Saint Hedda and Companions, Abbot of Peterborough in England, martyred by the Danes (869)
Saint Theodore and Companions, Abbot of Crowland in England, martyred by the Danes (869)
Saint Casilda of Toledo, an anchoress near Briviesca near Burgos (1050)
Newly Revealed Martyrs Raphael (Archimandrite), Nicholas (Deacon), Irene (child), and Eleni (who was also called Susanna) of Lesbos, and those with them (1463)
Hieromartyr Misael, Archbishop of Ryazan and Murom (1655)