December 18 (Eastern Orthodox liturgics)

Dec. 17 - Eastern Orthodox liturgical calendar - Dec. 19

All fixed commemorations below celebrated on December 31 by Orthodox Churches on the Old Calendar.

For December 18th, Orthodox Churches on the Old Calendar commemorate the Saints listed on December 5.

Saint Sebastian and the arrows.

St. Flannans Cathedral, Killaloe

Cell of St. Daniel the Hesychast (Daniil Sihastrul).

Greek Sources

Russian Sources

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Wikipedia