May 15 (Old calendar) / May 28 (New calendar)

May 15 (Old calendar) / May 28 (New calendar) Day of the Holy Spirit – Tone 7 Venerable Pachomius the Great, Founder of Cœnobitic Monasticism (348 A.D.). St. Isaiah, Bishop and Wonderworker of Rostov (1090). The slain Crown Prince Dimitry of Uglich and Moscow (1591). Ven. Isaiah, Wonderworker of the Kiev Caves (1115). Ven. Pachomius—Abbot, and Silvanus, of Nerekhta (1384). Ven. Evfrosin (Euphrosynus), Abbot and Wonderworker of Pskov, and his disciple,