John 19:14

The Parasceve of the Pasch; that is, the day before the paschal sabbath. The eve of every sabbath was called the Parasceve, or day of preparation. But this was the eve of a high sabbath, viz. that which fell in the paschal week. (Challoner) --- It was about the sixth hour when they crucified him. St. Mark, in his gospel, says, it was at the third hour that Jesus was crucified. These two evangelists are easily reconciled, if we consider that according to the custom of the Jews, all that took place between the third hour and the sixth hour of their day, was said to have happened in the third hour: their days being divided into four parts of three hours each, in the same manner as the nights were into four watches, of three hours each. St. Mark, therefore, might say very well, that the crucifixion of our Saviour took place in the third hour: though it might have been towards the conclusion of this general division of the day: whilst St. John, with a reason equally as good, says that it happened about the sixth hour. (John Nicolaus, in his marginal notes on St. Thomas Aquinas' Aurea Catena.)