How can I help someone who argues that he knows when the world will end?

I cannot find anything that gives an exact date. A friend is consumed by false claims that others are making about the end of the world (2017) and other claims that our President and royalty have the mark of the beast.  I feel that he is gullible but he is adamant about these claims that he got from YouTube.

Daniel 1:1 - 21

ESV - ¹ In the third year of the reign of Jehoiakim king of Judah, Nebuchadnezzar king of Babylon came to Jerusalem and besieged it. ² And the Lord gave Jehoiakim king of Judah into his hand, with some of the vessels of the house of God. And he brought them to the land of Shinar, to the house of his god, and placed the vessels in the treasury of his god.

Clarify • Share • Report • Asked June 28 2013 • Nancy McKay