This is perhaps a silly question, but what would you say is the exact date of the founding of the Catholic Church, if such a date can be given? Would it be the birth of Christ in 1 A.D. (leaving aside the question of the exact date of Christ's birth), the beginning of Christ's public ministry in 30 A.D., the descent of the Holy Ghost upon the Apostles and those with them at Pentecost in 33 A.D., or some other date?