“…this farewell meal was not the old Passover, but the new one, which Jesus accomplished…It was Jesus’ Passover. And in this sense he both did and did not celebrate the Passover: the old rituals could not be carried out when their time came. Jesus had already died. But he had given himself, and thus he had truly celebrated the Passover with them. The old was not abolished; it was simply brought into its full meaning.”
Ratzinger, Joseph (Pope Benedict XVI) JESUS OF NAZARETH, Part Two. Ignatius Press.
EARLY CHURCH FATHERS 