thumb|An [[Eastern Orthodox Church|Eastern Orthodox cross]]

April 11 - Eastern Orthodox liturgical calendar - April 13

All fixed commemorations below are observed on April 25 by Eastern Orthodox Churches on the Old Calendar.

For April 12th, Orthodox Churches on the Old Calendar commemorate the Saints listed on March 30.

Saints

  • Hieromartyr Artemon the Presbyter, of Laodicea (284-305) <small>(see also: March 24, April 13)</small>
  • Martyrs Demas and Protion, and those with them, by beheading (285-305)
  • Martyr Sabbas the Goth, at Buzău in Wallachia (372) <small>(see also: April 15 - Slavic)</small>
  • Saint Isaac the Syrian (Isaac of Monteluco), Abbot of Spoleto, Italy (c. 550) <small>(see also: April 11 - West)</small>
  • Venerable monk-martyrs David, John and Menas, of Palestine, shot by archers (after 636)
  • Saint Basil the Confessor, Bishop of Parium (754)
  • Venerable Anthusa of Constantinople (809)
  • Venerable Athanasia the Wonderworker (Athanasia of Aegina), Abbess, of Aegina (860) <small>(see also: April 18 - Greek)</small>
  • Saint Sergius II, Ecumenical Patriarch of Constantinople (1019)

Pre-Schism Western saints

  • Saint Vissia, a virgin-martyr in Fermo near Ancona in Italy under Decius (c. 250)
  • Saint Victor of Braga (São Victor), a catechumen martyred in Braga in Portugal under Diocletian, thus baptised in his own blood (c. 300)