April 6 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 6 are broadly the same, no matter which calendar is used.
Hieromartyr Archilias, Priest, and Martyr Jeremiah, of Rome (3rd century)
Venerable Platonis (Platonida) of Nisibis, reposed in peace (c. 300-308)
Martyr Platonis (Platonides) and two martyrs buried up to their loins, at Ascalon in Palestine.
Hieromartyr Irenaeus, Bishop of Sirmium in Hungary (304) (See also: March 26 - Church of Romania)
120 Martyrs of Persia under Shapur II (c. 344-347)
Martyrs Timothy and Diogenes, in Macedonia, by Arians (345)
Saint Eutychius, Patriarch of Constantinople (582)
Equal-to-the-Apostles Methodius of Moravia, Archbishop of Moravia and Enlightener of the Slavs (885) (see also: May 11)
Saints Florentius, Geminianus and Saturus, martyrs in Sirmium in Pannonia (4th century)
Saints Rufina, Moderata, Romana, Secundus and Seven Companions, martyred at Sirmium in Pannonia (4th century)
Saint Marcellinus of Carthage, imperial representative in North Africa, martyred by the Donatists (413)
Saint Celestine, Pope of Rome (432)
Saint Brychan, a King in Wales with twenty-four saintly children (5th century)
Saint Ulched (Ulchad, Ylched), a holy man who gave his name to Llechulched in Anglesey in Wales.
Saint Winebald (Winewald, Vinebaud), a monk at Saint-Loup-de-Troyes in France where he became abbot (c. 650)
Saint Derfel (Tervillius) the Prince, son of King Joel II, became a hermit in Llandderfel in Gwynedd in Wales (660) (see also: April 5)
Saint Gennard, a monk at Fontenelle Abbey in France and eventually Abbot of Flay (Saint-Germer-de-Fly Abbey) (720)