I was debating with another Christian and I stumbled upon a problem: I didn't know when Jesus was crucified. As the timing is integral to my argument, I ask for your help. Was Jesus crucified prior to or after the passover?

"And it was the preparation of the passover, and about the sixth hour: and he saith unto the Jews, Behold your King! But they cried out, Away with him, away with him, crucify him. Pilate saith unto them, Shall I crucify your King? The chief priests answered, We have no king but Caesar. Then delivered he him therefore unto them to be crucified." -- John 19:14-16 (KJV)


"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?...[The Lord's supper, Judas betrays Him, He's arrested and sentenced to death]...And it was the third hour, and they crucified him." -- Mark 14:12, 15-25 (KJV)

Note: Emphasis mine.