April 15 (Eastern Orthodox liturgics) - Wikipedia
https://en.wikipedia.org/wiki/April_15_(Eastern_Orthodox_liturgics)
Apr. 14 - Eastern Orthodox Church calendar - Apr.16. All fixed commemorations below are ... by fire (3rd century) (see also: April 13 - Slavonic); Martyr Sabbas the Goth, at Buzau in Wallachia (372) (see also: April 12 - Greek and Romanian) ...
April 18 (Eastern Orthodox liturgics) - Wikipedia
https://en.wikipedia.org/wiki/April_18_(Eastern_Orthodox_liturgics)
Apr. 17 - Eastern Orthodox Church calendar - Apr. 19. All fixed commemorations below are ... 303); Martyr Sabbas the Goth (Sabbas Stratelates), at Buzau in Wallachia (372) (see also: April 12 and April 15); Saint Acacius II, Bishop of Melitene ...