Misinterpretations often arise from perceived timeline conflicts with John's Gospel, wrongly assuming the Synoptics depict the Last Supper as the Passover meal on Nisan 15 while John places Jesus' crucifixion the next day before Passover; this ignores that 'the first day of unleavened bread, when they killed the passover' refers to Nisan 14, the preparation day when lambs were slain, harmonizing the accounts and affirming Jesus' death coinciding with the Passover sacrifice, rather than creating irreconcilable contradictions.
Mark 14:12
King James Version (1769)
12 And the first day of unleavened bread, when they killed the passover, his disciples said unto him, Where wilt thou that we go and prepare that thou mayest eat the passover?
Mark 14:12 describes the moment on the first day of Unleavened Bread, when Passover lambs were sacrificed, as Jesus' disciples ask where to prepare the Passover meal he would eat with them. This highlights Jesus' divine foreknowledge and authority, as he provides precise instructions for the upper room, setting the stage for the Last Supper, which reinterprets the Passover as a commemoration of his impending sacrificial death as the true Lamb of God who delivers from sin's bondage.