May 31 (Eastern Orthodox liturgics) - Wikipedia
https://en.wikipedia.org/wiki/May_31_(Eastern_Orthodox_liturgics)
May
30 - Eastern Orthodox Church calendar - June 1. All fixed
commemorations below ... upon witnessing the martyrdom of Hermias (160);
Martyr Philosophus at Alexandria (252); Martyrs Eusebios and Charalampos, in Nicomedia, by fire.
May 31 (Eastern Orthodox liturgics) - Revolvy.com
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May 30 - Eastern Orthodox Church calendar - June 1 All fixed commemorations ... at Alexandria (252) Martyrs Eusebios and Charalampos, in Nicomedia, by fire.