thumb|An Eastern Orthodox cross
May 17—Eastern Orthodox Church calendar—May 19
All fixed commemorations below are celebrated on May 31 by Orthodox Churches on the Old Calendar.
For May 18th, Orthodox Churches on the Old Calendar commemorate the Saints listed on May 5.
Saints
- Martyrs Peter of Lampsacus, Andrew, Paul, Dionysius, and Christina, at Euridinos, under Decius (c. 249 - 251)