on an old tradition, according to which the date of Christmas was fixed at nine months after 25 March, the date of the vernal equinox, on which the Annunciation was celebrated. The Jewish calendar date of 14 Nisan was believed to be that of creation, as well as of the Exodus and so of Passover, and Christians held that the new creation, both the death of Jesus and the beginning of his human life, occurred on the same date, which some put at 25 March in the Julian calendar. It was a traditional Jewish belief that great men lived a whole number of years, without fractions, so that Jesus was considered to have been conceived on 25 March, as he died on 25 March, which was calculated to have coincided with 14 Nisan. Sextus Julius Africanus (c.160 – c.240) gave 25 March as the day of creation and of the conception of Jesus. The tractate De solstitia et aequinoctia conceptionis et nativitatis Domini nostri Iesu Christi et Iohannis Baptistae falsely attributed to John Chrysostom also argued that Jesus was conceived and crucified on the same day of the year and calculated this as 25 March. A passage of the Commentary on the prophet Daniel by Hippolytus of Rome, written in about 204, has also been appealed to. Among those who have put forward this view are Louis Duchesne, Thomas J. Talley, David J. Rothenberg, J. Neil Alexander, and Hugh Wybrew. The Oxford Companion to Christian Thought also remarks on the uncertainty about the order of precedence between the celebrations of the Birthday of the Unconquered Sun and the birthday of Jesus: "This 'calculations' hypothesis potentially establishes 25 December as a Christian festival before Aurelian's decree, which, when promulgated, might have provided for the Christian feast both opportunity and challenge." Susan K. Roll calls "most extreme" the unproven hypothesis that "would call Christmas point-blank a 'christianization' of Natalis Solis Invicti, a direct conscious appropriation of the pre-Christian feast, arbitrarily placed on the same calendar date, assimilating and adapting some of its cosmic symbolism and abruptly usurping any lingering habitual loyalty that newly-converted Christians might feel to the feasts of the state gods". Winter solstice hypothesis Among scholars who view the celebration of the birth of Jesus on 25 December as motivated by choice of the winter solstice, rather than that he was conceived and died on 25 March, some reject the