Mark has Jesus being crucified at 9:00 a.m.; whereas Matthew and Luke have the crucifixion at noon and John has Jesus before Pilate at noon.
MK 15:25 "It was nine o'clock in the morning when they crucified him."
MT 27:45-50 "At noon the whole country was covered with darkness, which lasted for three hours. At about three o'clock, Jesus cried out....Jesus again gave a loud cry and breathed his last.
JH 19:13 "...Pilate...took Jesus outside and sat down on the judge's seat in the place called `The Stone Pavement'....It was then almost noon of the day before the Passover."