Invention and convention: Jewish and Christian critique of the Jewish fixed calendar

The institution of the Jewish fixed calendar has provoked muchcontroversial discussion not only among Jewish, but also Christian scholars. The significant contributions to the subject by two of the great sixteenth-century polymaths, the Jew Azariah de' Rossi and the Christian Sebastian Münster, pinpoint the delicate nature of calendrical investigation. Münster's frequent use of one particular piyyut (a religious poem) to undermine the basis of the Jewish fixed calendar is intended to defend the contradictory calendrical data in the Gospels. De' Rossi implicitly attacks Muenster for his recourse to this unhistorical text. Yet de' Rossi himself is intent on proving that the Jewish fixed calendar is a late post-talmudic convention, an iconoclastic approach which was not welcome in certain rabbinic circles. This revised version was published online in August 2006 with corrections to the Cover Date.