b'ak'tuns represents 144,000 days, or 394.26 years. 21/12/2012 (13.0.0.0.0 to the Maya) is believed to to be the end-date of a 5,125-year-long cycle in the Mayan Long Count calendar . Yet it doesn't end there; 469 years before the 1159 BC global catastro phe, there were major climate issues circa 1628 BC, thirteen to