The Diagram below shows the 24 hours of the "Preparation Day", that is to say, the day before the Passover (John 19:14, etc.). The Four Gospels agree in stating that the Lord was laid in the Sepulchre on the Preparation Day, which was Nisan 14th, immediately before "the High Sabbath", Nisan 15th (Matthew 27:62. Mark 15:42. Luke 23:54. John 19:31, 42). Therefore He must have been crucified on Wednesday, 14th of Nisan (see Appendix 144,  Appendix 156,  Appendix 166).

  As shown above, the 14th of Nisan, which was the "Preparation Day", began at sunset on our Tuesday (Gentile reckoning). "The sixth hour" of John 19:14 is the sixth hour of the night, and therefore corresponds to midnight, at which, according to Gentile reckoning, Wednesday began.

  The Roman numerals on the dial-plate show the 24 hours of the complete Gentile day. And on either side of the dial are shown the Hebrew "hours" corresponding to the Gentile hours a.m. and p.m.

  The twenty-four hours were divided into the twelve hours of the night (reckoned from sunset), and "twelve hours in the day" (reckoned from sunrise. See John 11:9). Hence "the sixth hour" of John 19:14 was our midnight; "the third hour" of Mark 15:25 was our 9 a.m.; "the sixth hour" of Matthew 27:45; Mark 15:33; Luke 23:44; was our noon; and "the ninth hour" of Matthew 27:45, 46; Mark 15:33, 34; Luke 23:44; was our 3 p.m.