May 16 (Old calendar) / May 29 (New calendar) Fast-free week Postfeast of Pentecost — 3rd Day of the Trinity Virgin Martyr Theodosia of Tyre (307-308). Repose of Bl. John of Ustiug, Fool-for-Christ (1494). Virgin Martyr Theodosia, Nun, of Constantinople (726-730). Icon of the Most-holy Theotokos, “SURETY OF SINNERS”. Many of the hymns of Pentecost are repeated in the postfestal services of this week, and references to the Holy Spirit,