April 1 (Eastern Orthodox liturgics) - Wikipedia
https://en.wikipedia.org/wiki/April_1_(Eastern_Orthodox_liturgics)
Mar. 31 - Eastern Orthodox Church calendar - Apr. 2. All fixed commemorations below ... (820); Saint Procopius of Sázava, Abbot of Sázava in Bohemia (1053) ...
September 16 (Eastern Orthodox liturgics) - Revolvy Quizzes
broom02.revolvy.com/main/index.php?s...
Sep 15, 2016 - Saint Procopius of Sazava, Abbot of Sazava in Bohemia (1053) (see also: April 1)