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 honour a saint.
The Roman Catholic Church celebrates the feast on 29 August, as does the Lutheran Church. Many other churches of the Anglican Communion do so as well, including the Church of England, though some designate it a commemoration rather than a feast day.[4]
The Eastern Orthodox and Byzantine Catholic churches also celebrate this feast on 29 August. This date in the Julian Calendar, used by the Russian, Macedonian, Serbian and Ethiopian Orthodox Churches, corresponds in the twenty-first century to 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.
The Armenian Apostolic Church commemorates the Decollation of St. John on the Saturday of Easter Week, while the Syriac Orthodox, Indian Orthodox, and Syro-Malankara Catholic Churches commemorate his death on 7 January.