In the 1970’s, I read all the UFO/Ancient Mystery/Paranormal crap I could, and the first time I recall seeing the Mayan Calendar Cycle mentioned was in the book version of the TV “documentary” The Outer Space Connection (1974-75), produced by Alan “In Search of…” Landsberg, EXCEPT that the date given was Christmas Eve 2012. Then around 1978-9, I read Robert Anton Wilson’s Cosmic Trigger: The Final Secret of the Illuminati, in which he discussed the idea that a ton of cosmic & cultural cycles converged in 2012 (from a study by the McKenna brothers). So did those start the 2012 meme or was there even an earlier source?