Mayan Calendar Explained. A particular day, month, and year can be expressed as a long count date using baktun, katun, tun, uinal, and k’in units of time together with a haab and a tzolk’in calendar dates. The maya calendar uses three different dating systems in parallel, the long count, the tzolkin (divine calendar), and the haab (civil calendar).
The maya calendars serve a. The long count was principally used for historical purposes, since it can define any date for millenia in the past and future.