"Heck, the Jehovah's Witnesses have called the end numerous times and nothing. It even turned me into a non-believer."
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If Jehovah's Witnesses have "called the end numerous times" and been wrong, then that attacks the credibility of the Jehovah's Witnesses....and not God and His Word that tells us not - not - not - not - to set dates. 
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So Jehovah's Witnesses have been wrong ("numerous times").....just as Harold Camp was wrong (twice)....just as the book "88 reasons why the rapture will occur in 1988" was wrong.....and its sequel "89 reasons why the rapture will occur in 1989" was wrong.....just as many who peddle snake oil sold garbage just to make an easy buck were wrong.
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God told us not - not - not - not to set a date or dates. If you became a "non-believer" of the Jehovah's Witnesses because you got tired of them being wrong "numerous times," that is fine and I don't blame you.
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But do not confuse the Jehovah's Witnesses with God Himself and God's Word itself.