Church calendar for 15 May 1991

Saints commemorated

• Hierarch Athanasius the Great of Alexandria ок. 297 — †373
• Equal to the Apostles, Tsar Boris (Michael), Tsar of Bulgaria ок. 835 — †907
• Hierarch St. Reticius, Bishop of Autun ок. 310–334
• Venerable Wiborada of St. Gallen втор. пол. IX века — 926