Today is kept as a strict fast day, on whatever day of the week it falls. Because the holy Forerunner's head was brought to Herod on a platter, it is a pious custom not to eat anything from a plate or platter today.
Troparion of St. John the Baptist
The memory of the just is celebrated with hymns of praise but the Lord's testimony is enough for thee, O Forerunner, for thou wast shown to be more wonderful than the Prophets since thou wast granted to baptize in the running waters Him Whom thou didst proclaim. Then having endured great suffering for the Truth, Thou didst rejoice to bring, even to those in hell the good tidings that God Who had appeared in the flesh takes away the sin of the world and grants us the great mercy.
Kontakion of St. John the Baptist
The beheading of the glorious Forerunner was a divine dispensation that the coming of the Savior might be preached to those in hell. Lament then, Herodias, that thou didst demand a murder despising the law of God and eternal life.