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

April 15 - Eastern Orthodox liturgical calendar - April 17

All fixed commemorations below are observed on April 29 by Eastern Orthodox Churches on the Old Calendar.

For April 16th, Orthodox Churches on the Old Calendar commemorate the Saints listed on April 3.

Saints

  • Martyrs Leonidas of Nea Epidavros, and those with him (250 or 258):

:* Charissa, Nika (Niki), Galina, Callista (Calisa, Calida), Nunechia, Basilissa, Theodora, and Irene, of Corinth.

  • Hieromartyrs Felix, Bishop of Spoleto, and Januarius, Presbyter, and Martyrs Septeminus and Fortunatus, of Lycaonia (294 or 304) <small>(see also: August 30)</small>
  • Virgin-martyrs Agape, Irene, and Chionia of Aquileia, in Thessaloniki (304) <small>(see also: April 3)</small>
  • Saints Agatho, Eutychia, Cassia and Phillippa, the Confessors, in Thessaloniki, by imprisonment (304)

Pre-Schism Western saints

  • Virgin-martyr Encratia (Encratis, Encratide, Engracia), who suffered terribly for her faith in Saragossa in Spain (c. 304)