And when the sixth hour was come, there was darkness over the whole land until the ninth hour.
Read Chapter 15
Augustine of Hippo
AD 430
The Lord was crucified at the third hour by the tongues of the populace, at the sixth hour by the hands of the soldiers. When Pilate took his seat before the tribunal, it was “about the sixth hour,” or early in the sixth hour. When Jesus was nailed to the tree between two thieves, it was the end of the sixth hour. It was between the sixth and ninth hour that the sun was obscured and the darkness prevailed, as we have it jointly attested on the authority of the three Evangelists Matthew, Mark and Luke.
Note how clearly was fulfilled the prophecy of our Savior’s passion. It was to be a day in which “there shall be no light.” “From the sixth hour to the ninth hour there was darkness over all the earth.” … This was also fulfilled figuratively by his priestly persecutors, for among them came darkness, cold and ice, following upon their indignities to the anointed One. Their understanding also was darkened, so that the light of the gospel did not shine in their hearts, and their love to God grew cold. Then in the evening the light of the knowledge of the Christ arose, so that they who sat in darkness and the shadow of death saw a great light.
(and when did it "shudder exceedingly "except at the passion of Christ, when the earth also trembled to her centre, and the veil of the temple was rent, and the tombs were burst asunder?