31 May 1991, Friday (18.05 according to the old style)
Church calendar for 31 May 1991
Saints commemorated
- Hieromartyr John I, Pope of Rome V век — †18 мая 526
- Martyr Alexandra of Ancyra † нач. IV в.
- Martyr Heraclius of Athens датировка не установлена (ранняя эпоха гонений)
- Martyr Petronilla of Rome I—II вв. (легендарно)
- Righteous Theodotus of Ancyra, the Innkeeper † ок. 303
- Venerable Macarius (Glukharev) of Altai 1792 — 1847