John tells us that Jesus were with Pilate about the sixth hour.
John 19
13When Pilate heard this, he brought Jesus out and sat down on the judge's seat at a place known as the Stone Pavement (which in Aramaic is Gabbatha). 14It was the day of Preparation of Passover Week, about the sixth hour.
"Here is your king," Pilate said to the Jews.
but Mark tell us that they Crucified him at the third hour.
Mark 15
25It was the third hour when they crucified him.
Can you explain this for me please? i don't understand when they Crucified him exactly