April 21 (Eastern Orthodox liturgics)
April 20 - Eastern Orthodox liturgical calendar - April 22
Martyrs Theodore of Perge in Pamphylia, his mother Philippa, and Dioscorus, Socrates, and Dionysius.
St. Alexandra the Empress.
Hieromartyrs Januarius, Bishop of Benevento, and his companions.
Venerable Anastasius Sinaita, Abbot of the Monastery of St. Catherine at Sinai.
April 20 (Eastern Orthodox liturgics)
April 19 - Eastern Orthodox liturgical calendar - April 21
Zacchaeus's sycamore fig in Jericho, contained in the grounds of the Russian Museum.
Venerable Anastasius Sinaita, Abbot of the Monastery of St. Catherine at Sinai.
Venerable Alexander of Oshevensk, founder of Oshevensk Monastery, Arkhangelsk.
Child-Martyr Gabriel of Zabludov (Gabriel of Slutsk).