April 21 (Eastern Orthodox liturgics) - Wikipedia
https://en.wikipedia.org/wiki/April_21_(Eastern_Orthodox_liturgics)
Apr. 20 - Eastern Orthodox Church calendar - Apr. 22. All fixed commemorations below are ... (434); Venerable Anastasius Sinaita, Abbot of the Monastery of St. Catherine at Sinai (c. 700) (see also: April 20); Martyr Karol (Charles) ...
April 20 (Eastern Orthodox liturgics) - Wikipedia
https://en.wikipedia.org/wiki/April_20_(Eastern_Orthodox_liturgics)
Apr. 19 - Eastern Orthodox Church calendar - Apr. 21. All fixed commemorations below are ... Hieromartyr Anastasius II, Patriarch of Antioch (609); Venerable Anastasius Sinaita, Abbot of the Monastery of St. Catherine at Sinai (ca. 700) ( see also: April 21); Venerable Ioannis the Palaiolavritis ("of the Old Lavra"), at St.