>>My wife and I were driving home last night and at 6:06 PM the news on the radio was discussing the importance of 666 – or 6-06-2006. Why did the announcer make a point to let us know it was 6:06? Ha!
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>>Well the world is still here or at least I think I think so. What was missing from all the radio, television and newspaper news yesterday that I came in contact with was the Anniversary of June 6, 1944 D-Day. I guess the devil makes better news.
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>I don't think June 6 ever goes unnoticed, any more than September 11 or November 22 do. What's interesting is hardly anyone knows what the D stands for. My understanding is there is no definitive answer.

From the DOD's definition of terms.

D-Day : The unnamed day on which a particular operation commences or is to commence
http://www.dtic.mil/doctrine/jel/doddict/data/t/05449.html