May 18 (Eastern Orthodox liturgics)
May 17—Eastern Orthodox Church calendar—May 19
All fixed commemorations below celebrated on May 31 by Orthodox Churches on the Old Calendar.
For May 18th, Orthodox Churches on the Old Calendar commemorate the Saints listed on May 5.
Martyr Theodotus of Ancyra.
Seal of "Stephen, Patriarch of Constantinople and New Rome" - i.e. either of Stephen I or II.
St. Venantius of Camerino is hung upside-down over a fire, and then thrown to the lions.
St. Mildthryth.
Greek Sources
Russian Sources
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Wikipedia