April 4 (Eastern Orthodox liturgics) - Wikipedia
https://en.wikipedia.org/wiki/April_4_(Eastern_Orthodox_liturgics)
Apr. 3 - Eastern Orthodox Church calendar - Apr. 5. All fixed commemorations below are ... 560); Venerable Saints Theonas, Symeon, and Fervinus (Phorbinus) . (see also: April 5 - Slavonic); Venerable Platon the Studite (Plato of Sakkoudion) , ...
May 31 (Eastern Orthodox liturgics) - Revolvy
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30 - Eastern Orthodox Church calendar - Apr. 1 All fixed commemorations below are ..... 560) Venerable Saints Theonas, Symeon, and Fervinus (Phorbinus).