A member of JWN looked through 9 sets of encyclopedias, all produced by different authors and companies. In each set of encyclopedias, he looked up the following terms: Jerusalem, Israel, Nebuchadnezzar, Zedekiah and Jews. He took pictures of each set of encyclopedias, and every mention of the destruction of Jerusalem. So what do they say? There was found absolutely no mention of 607 BCE. All reference books, both secular and religious, agree that Jerusalem was destroyed in 587-586 BCE.
Furthermore, the date 1914 was actually originally calculated by the founder of the Jehovah's Witness religion, Charles Taze Russel, based on calculations of pyramids!
The October and November 1st 2011 Watchtower attempt to prove that Jerusalem fell in 607, rather than the historically accepted 587. Click here for Carl Jonsson's brilliant examination in PDF format, which shows the intellectual dishonesty of the Watchtower by including inaccurate information and misquotes.]