February 18 in Eastern Orthodox liturgical calendars is a feast day and a day of commemoration of saints and martyrs. Although some Orthodox churches use the Revised Julian Calendar and others use the traditional Julian calendar, the fixed commemorations for their respective February 18 are broadly the same, no matter which calendar is used.
Martyrs Leo and Parigorius of Patara in Lycia (c. 258)
Venerable Agapitus the Confessor and Wonderworker, Bishop of Synnada in Phrygia (c. 308–324)
Martyrs Victor, Dorotheus, Theodoulus, and Agrippa, at Synnada in Phrygia Salutaris, who suffered under Licinius (c. 308–324)
Martyr Piulius (Publius), by the sword.
Saint Flavian the Confessor, Archbishop of Constantinople (c. 449) (see also: February 16)
Saint Leo the Great, Pope of Rome (461) (see also: November 10 - West)
Saint Blaise of Amorion and Mt. Athos (c. 908)
Saints Maximus, Claudius, Praepedigna, Alexander and Cutias, martyrs in Rome who suffered under Diocletian (295) (see also: August 11)
Saints Lucius, Silvanus, Rutulus, Classicus, Secundinus, Fructulus and Maximus, martyrs in North Africa.
Saint Helladius of Toledo, Archbishop of Toledo and Confessor (632)
Saint Colman of Lindisfarne, Bishop of Lindisfarne and Confessor (676)
Saint Ethelina (Eudelme), the patroness of Little Sodbury, now in Gloucestershire in England.
Saint Angilbert, Abbot of St. Riquier in the north of France where there were some 300 monks (c. 740–814)
Venerable Cosmas, founder of Yakhromsk Monastery (ru), Vladimir (1492)
Saint Nicholas V of Georgia, Catholicos of Georgia (1591)
New Hieromartyr Alexander Medvedsky, Priest (1932)
New Hiero-confessor Vladimir (Terentiev), Abbot, of Zosima Hermitage (1933)