The term 'NINE-Day Catholic Prayer' is a reference to the Catholic tradition of praying the novena. A novena is a NINE-day period of prayer, usually in preparation for a feast day or special occasion. It is believed that the practice of praying the novena originated in the early Church, and it has been a part of Catholic tradition ever since. The word 'novena' comes from the Latin word for 'NINE, ' and it is often used to refer to any NINE-day period of prayer.