All four Gospels agree that Jesus was crucified on a Friday during Passover week. They appear to disagree about the precise Jewish day — whether that Friday was Nisan 14, the day the Passover lambs were slaughtered, or Nisan 15, the day following the Passover meal. This apparent contradiction has been raised by Muslim apologists, secular skeptics, and even some biblical scholars. This article demonstrates, through philological analysis of the Greek, the Jewish calendrical background, the crucial distinction between household and public Passover sacrifices, and the unanimous liturgical tradition of the Catholic and Orthodox churches, that no real contradiction exists — and that the four Gospels, read carefully in their historical and theological context, present a coherent, unified, and historically reliable account of the Passion of Jesus Christ.