The argument in the last paragraph of this page would seem to favor commencing the 1260 years with the decree of Justinian in 533, as it says: “The bishop of Rome was declared to be the head over the entire church.” And immediately following it says: “And now began the 1260 years.” In various other places in the book, which will be noted later the 1260-year period is definitely stated to begin in 538. WWPGC 8.8
Response: Negative. Implication calling for a change was rejected. No change was made. WWPGC 8.9