Three and a half days is taken from Rev.11:11. This is for the so called Christians that refuse to read the Word of God. The Book of Daniel and Revelation fit like a custom glove. Christ also in Matt.24, Mark 13, and Luke 21, has given all the information that we need to be good Watchmen on the wall. The world has force fed those with itchy ears, a steady diet of 12-21-12 that some Christians were amazed that they were still here in the flesh on 12-22-12.
We are the "fig tree generation". Many were quoting "No man knows the day or hour" Scripture. But we have it down to 3 1/2 days. These Two Witnesses, which I believe that the Word documents as Mosses, and Elijah will be a counter-balance to the Fake-Christ [Satan incarnate]. These Two will be present to within 3 1/2 days of the 7th. Trump. When these Two finish their business, they will be murdered and their bodies will lie in the open square.
The Word states that the #1 Antichrist [Instead of Christ] will be in the Temple in Jerusalem for 3 1/2 yrs.-this has been shorten down. For the identity of the Two Witnesses, look at the miracles that they do in Rev.11-then go back and remember and document whom the Lord used for these same miracles. Christ also met with these Two on the Mt. of Transfiguration. One represented the Law, and the Other one represented all of the Prophets. Up until this point, neither of them tasted death, but were simply taken out of the way.
Jerusalem is being trodden down by the gentiles as predicted. People are making big money on the "left behind", and the end of the world everything. For those seeking the Truth, look to the Word, and stop listening to Non-Believers who are making merchandise of the ignorant.