-1517 AD: Luther posts his Ninety-Five Theses, generally assumed to be the spark that ignited the Protestant split.
There wasn't a set bible until the council of Trent. There are no ecumenical councils and there are no Papal declarations from the chair. Any list of books was fallible and could have been changed at any time. For all intents and purposes, your earlier date are rational. But the Roman Catholic Canon wasn't set until the council of Trent.
1545 to 1563 AD: Council of Trent And it has thought it meet that a list of the sacred books be inserted in this decree, lest a doubt may arise in any one's mind, which are the books that are received by this Synod. They are as set down here below:
This is a protestant myth. The canon of Scripture was fixed by a series of three councils, the first of which took place in 419, the last of which took place in 692. According to the theory of ecclesiology held by the Latins since their schism from the Church (hey this is an open discussion thread, but it was started with a post from an Orthodox source), the first of these councils, held at Carthage, sufficed, since its acta received an assent from the Pope of Roma (as the local patriarch). The last of the councils was the disciplinary session of the Sixth Ecumencial Council, which explicitly included the canons of Carthage among those to be held as valid throughout the Church. Some hold that one of the canons of the Council of Chalcedon (451) gave universal force to the canons of Carthage, but application of its reference to "the ancient canons" to canons of a council held a mere 32 years earlier is dubious.
Trent merely reiterated for the Latins, in the face of protestant attempts to abridge it, the canon as they had held it since the reaction against Marcion's heretical canon had forced a decision on "the books to be read in the churches" by a local council of the Patriarchate of Rome over 11 centuries earlier.