Augustine of Hippo
The Scriptures affirm that the duration was not a full three days: the latter part of the first day was accounted for, as was the earlier part of the third day; however, the second day was wholly complete, encompassing a full twenty-four hours, comprised of twelve hours of darkness and twelve hours of daylight. The Jewish leaders condemned Him to crucifixion at the third hour of the sixth day, just prior to the Sabbath. He was raised on the cross at the sixth hour and surrendered His spirit at the ninth hour (Cf. Matt. 27:23-50).