A baktun /ˈbɑːktuːn/[1] (properly bʼakʼtun [ɓakʼtun]) is 20 kʼatun cycles of the ancient Maya Long Count Calendar.The Classic period of Maya civilization occurred during the 8th and 9th baktuns of the current calendrical cycle.Archaeologist J. Eric S. Thompson stated that it is erroneous to say that a Long Count date of, for example, 9.15.10.0.0 is in the “9th baktun”, analogous to describing the year 209 AD as in the “2nd century AD”.Alternatively, the first baktun could instead be referred to as the 0th or null to avoid this ambiguity.[citation needed] Today, 13:37, Sunday, February 2, 2025 (UTC), in the Long Count is 13.0.12.5.6 (based on the GMT correlation).