May 20 (Eastern Orthodox liturgics) - Wikipedia
https://en.wikipedia.org/wiki/May_20_(Eastern_Orthodox_liturgics)
May 19 - Eastern Orthodox Church calendar - May 21. All fixed commemorations below ... Holy Martyrs of Mamilla, Jerusalem (614); Saint Thalassius the Myrrh- gusher, of Libya (648); Saints John, Joseph and Nicetas, monks of Nea Moni on ...
May 20 - OrthodoxWiki
https://orthodoxwiki.org/May_20
Aug 12, 2006 - ... also May 17); Holy Martyrs of Mamilla, Jerusalem (614); Saint Thalassius the Myrrh-gusher, of Libya (648); Saints John, Joseph and Nicetas, ...