Now from the sixth hour there was darkness over all the land unto the ninth hour. (Matthew 27:45)
And when the sixth hour was come, there was darkness over the whole land until the ninth hour. (Mark 15:33)
And it was about the sixth hour, and there was a darkness over all the earth until the ninth hour. (Luke 23:44)
John 19:14 tells us that Jesus was crucified on the day of preparation for the Jewish Passover, which means He was crucified at the same day that lambs were being sacrificed throughout Jerusalem. This is symbolic, because Jesus is the ultimate sacrifice for our sins. But there was another symbolic event that day. Three of the Gospels tell us that there was COMPLETE DARKNESS for three hours while He hung on the Cross.
In the Jewish calendar, this would have been from 12:00 noon to 3 P.M. It's quite possible that Passover meals were already being served and/or eaten during this time. Imagine this happening in complete darkness during the middle of the day for three hours, and during the most holy feast of the year! Darkness any day of the year would be frightening enough; for it to occur on a high holiday should have had the Jews wondering if God was angry with THEM. It was as if God was judging them, disgusted with their hypocritical worship and their meaningless rituals while they crucified their Messiah.
In fact, God DID judge Israel about 40 years later when Jerusalem, the temple, and the Jewish priesthood were utterly destroyed. And if God destroyed His "chosen people" because they refused to repent, don't think for a minute that He won't judge America for rejecting Him! Something to think about this "Good" Friday.