May 11 (Eastern Orthodox liturgics) - Wikipedia
https://en.wikipedia.org/wiki/May_11_(Eastern_Orthodox_liturgics)
May 10 – Eastern Orthodox Church calendar – May 12. All fixed commemorations below ... beheaded in Byzantium (288); Martyr Armodius; Martyr Acacius of Lower Moesia; Saints Cyril and Methodius, Equal-to-the- Apostles and Enlighteners ...
May 11 - OrthodoxWiki
https://orthodoxwiki.org/May_11
Aug 12, 2006 - ... (288); Martyr Armodius; Martyr Acacius of Lower Moesia; Holy Equals-to-the- Apostles Cyril and Methodius, Enlighteners of the Slavs (869, ...