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May 20 - Eastern Orthodox Church calendar - May 22

All fixed commemorations below are celebrated on June 3 by Orthodox Churches on the Old Calendar.

For May 21st, Orthodox Churches on the Old Calendar commemorate the Saints listed on May 8.

Saints

  • Holy Equals-to-the-Apostles Emperor Constantine (337), and Empress Helena, his mother (327)
  • Martyrs Polyeuctus, Victorinus, and Donatus, at Caesarea in Cappadocia.
  • Hieromartyr Secundus and those with him, in Alexandria (356)
  • Saint Adelphios, Bishop of Onouphis, in Byzantine Egypt (c. 362)
  • Saint Boros, monk.
  • Saint Christopher I, Patriarch of Antioch (967)

Pre-Schism Western saints

  • Hieromartyrs Timothy, Polius and Eutychius, deacons, in Mauretania Caesariensis, Morocco.
  • Hieromartyr Valens and Companions, Bishop who was martyred in Auxerre in France along with three children.
  • Saint Barrfoin (Bairrfhionn, Barrindus) of Killbarron (6th century)