The liturgical commemoration of the Beheading of St. John the Baptist is almost as old as that commemorating his birth, which is one of the oldest feasts, if not the oldest, introduced into both the Eastern and Western liturgies to honor a saint.
Orthodox churches celebrate this feast on 29 August. This date in the Julian Calendar, used by the Russian, Macedonian, Serbian and Ethiopian Orthodox Churches, corresponds toth 11 September in the Gregorian Calendar. The day is always observed with strict fasting, and in some cultures, the pious will not eat food from a flat plate, use a knife, or eat round food on this day.