National Geographic explains the Long Count calendar and writes that the calendar will reset when it reaches 13 Baktun and therefore initiate a new cycle. This is not true but it remains a common belief among some Mayanists and the majority of 2012ers. People usually set up a basic dichotomy between two supposedly radically different conceptualizations of time: circular/cyclical and linear. This is a false dichotomy. A cyclical time consists of a linear sequence and linear time includes repretitive periods that are cyclical. They are part of the same way of spatializing time to use a Bergsonian concept. Time is not linear or cyclical. Following McTaggart we can describe events as occuring before or after each others or the events are being past, present or future. When we describe events like that we usually separate them in space rather than in time.
Apart from these Western metaphysical problems, what did Maya metaphysical beliefs concerning the Long Count look like? Did they believe the Long Count was linear or cyclical? I claim that these concepts are irrelevant to the Long Count. 2012ers believe that the Aztec calendar stone is evidence of Maya cyclical time but that is of course dead wrong. This calendar stone is in no way similar to the way the Classic period Maya stacked time periods on top of each others. Each new period became larger higher up in the double column. The time periods became heavier and the burden of time increased as is indicated by gods carrying the time periods on their back. The Maya Long Count is not cyclical or linear. It is cumulative or perhaps massive (as in weight).