Was Jesus crucified in the third hour or the sixth hour?

Mark 15:25 (cf. John 19:14) Was Jesus crucified in the third hour or the sixth hour?

Mark 15:25 It was the third hour when they crucified him.

(John 19:14-16 NIV) It was the day of Preparation of Passover Week, about the sixth hour. "Here is your king," Pilate said to the Jews. {15} But they shouted, "Take him away! Take him away! Crucify him!" "Shall I crucify your king?" Pilate asked. "We have no king but Caesar," the chief priests answered. {16} Finally Pilate handed him over to them to be crucified. So the soldiers took charge of Jesus.

Answer:

Mark uses the Jewish timekeeping system and John uses the Roman

Roman time went from midnight to midnight. The Jewish 24 hour time period began in the evening at 6 pm and the morning of that day began at 6 am. Thus Mark is stating that Jesus was crucified at 9 am and John is stating that the trial was still on at 6 am. In John 19:16 we see that the soldiers took charge of Jesus, meaning that the crucifiction had not yet taken place. So the times are reasonable.

If we look at John's other uses of time 10 am seems a reasonable time to be preaching.

(John 1:35-39 NIV) The next day John was there again with two of his disciples. {36} When he saw Jesus passing by, he said, "Look, the Lamb of God!" {37} When the two disciples heard him say this, they followed Jesus. {38} Turning around, Jesus saw them following and asked, "What do you want?" They said, "Rabbi" (which means Teacher), "where are you staying?" {39} "Come," he replied, "and you will see." So they went and saw where he was staying, and spent that day with him. It was about the tenth hour.

With the woman at the well story of John 4, Jesus was tired from his journey and 6 pm seems a reasonable time for this. Just before sundown when it was cool and the woman would come to draw water.

(John 4:3-7 NIV) When the Lord learned of this, he left Judea and went back once more to Galilee. {4} Now he had to go through Samaria. {5} So he came to a town in Samaria called Sychar, near the plot of ground Jacob had given to his son Joseph. {6} Jacob's well was there, and Jesus, tired as he was from the journey, sat down by the well. It was about the sixth hour. {7} When a Samaritan woman came to draw water, Jesus said to her, "Will you give me a drink?"