Edited sentence: 0.0.0.0.1   1 K'in 1 1/365.0.0.0.1.0   1 Winal = 20 K'in 20 1/18.0.0.1.0.0   1 Tun = 18 Winal  360 1.0.1.0.0.0   1 K'atun = 20 Tun  7,200 19.7.1.0.0.0.0   1 B'ak'tun = 20 K'atun  144,000 394.Among other calendars devised in pre-Hispanic Mesoamerica, two of the most widely used were the 365-day solar calendar (Haab' in Mayan) and the 260-day ceremonial calendar, which had 20 periods of 13 days.Because the two calendars were based on 365 days and 260 days respectively, the whole cycle would repeat itself every 52 Haab' years exactly.Rather than using a base-10 scheme, like Western numbering, the Long Count days were tallied in a base-20 scheme.Representation   Long Count subdivisions  Days ~ solar years.Stela 2.The Haab' and the Tzolk'in calendars identified and named the days, but not the years.The Long Count calendar identifies a date by counting the number of days from August 11, 3114 BCE in the proleptic Gregorian calendar or September 6 in the Julian calendar, (−3113 astronomical dating).The Long Count is not consistently base-20, however, since the second digit rolls over to zero when it reaches 18.The combination of a Haab' date and a Tzolk'in date was enough to identify a specific date to most people's satisfaction, as such a combination did not occur again for another 52 years, above general life expectancy.The following table shows the period equivalents as well as Maya names for these periods:.This 260-day calendar was known as the Tzolk'in to the Maya and tonalpohualli to the Aztecs.This period is generally known as the Calendar Round.Thus 0.0.0.1.5 is equal to 25, and 0.0.0.2.0 is equal to 40.Thus 0.0.1.0.0 does not represent 400 days, but rather only 360 days.To measure dates over periods longer than 52 years, the Mesoamericans devised the Long Count calendar