They can't give you a definite answer because they are wrong. No one can know the day or hour. there is a reason for this. It may be Feb 4 2011 and 5:07 PM here but on the other side of the planet it is a day later and in some places there may be a 2 day difference.
I believe (my opinion) because of the signs of the times it will be within the next two years.
Here is one of the latest signs.
Egypt's civil war is in Scripture.
Isa 19:2 And I will set the Egyptians against the Egyptians: and they shall fight every one against his brother, and every one against his neighbour; city against city, and kingdom against kingdom.
Isa 19:3 And the spirit of Egypt shall fail in the midst thereof; and I will destroy the counsel thereof: and they shall seek to the idols, and to the charmers, and to them that have familiar spirits, and to the wizards.
Isa 19:4 And the Egyptians will I give over into the hand of a cruel lord; and a fierce king shall rule over them, saith the Lord, the LORD of hosts.
The spirit of Egypt is failing because they become exhausted by internal strife. The cruel Lord is the Antichrist.
It is also in Daniel 8:23 and 11:40-45
Dan 8:23 And in the latter time of their kingdom, when the transgressors are come to the full, a king of fierce countenance, and understanding dark sentences, shall stand up.
Dan 11:40 And at the time of the end shall the king of the south push at him: and the king of the north shall come against him like a whirlwind, with chariots, and with horsemen, and with many ships; and he shall enter into the countries, and shall overflow and pass over.
Dan 11:41 He shall enter also into the glorious land, and many countries shall be overthrown: but these shall escape out of his hand, even Edom, and Moab, and the chief of the children of Ammon.
Dan 11:42 He shall stretch forth his hand also upon the countries: and the land of Egypt shall not escape.
Dan 11:43 But he shall have power over the treasures of gold and of silver, and over all the precious things of Egypt: and the Libyans and the Ethiopians shall be at his steps.
Dan 11:44 But tidings out of the east and out of the north shall trouble him: therefore he shall go forth with great fury to destroy, and utterly to make away many.
Dan 11:45 And he shall plant the tabernacles of his palace between the seas in the glorious holy mountain; yet he shall come to his end, and none shall help him.
The four horns are Greece, Turkey, Egypt and Syria.
King of the South = Egypt
King of the North = Syria
The Antichrist is from Syria. See: Dan 8:42
http://www.armageddonangelsufos.com