After carefully examining seven key phrases in the Bible, which are a part of the 70 7s in Daniel 9, he learns that one seven period is 2,520 days. So, a total of 70 of these 2,520 day periods are in this Bible prophecy, giving it a total of 176,400 days. The first section is 7 x 7s or 17,640 days, which deals with the rebuilding of Jerusalem. The second section is 62 x 2,520 days or 156,240 days to the coming of the Messiah on the first Palm Sunday. And, on the prophetic clock or the prophetic calendar is a period of 2,520 days, divided into two equal halves of 1,260 day each. It is very important for a persons to understand the 70 x 7s of Daniel, as it is the backbone of Bible Prophecy.