The Tzolkin, meaning “the distribution of the days,” is also called the Divine Calendar and the Sacred Round. It is a 260-day calendar with 20 periods of 13 days, and it is used to determine the time of religious and ceremonial events. The days in each period are numbered from one to 13. Each day is also given a name (glyph) from a sequence of 20 day names.
The Mayan Calendar consists of three separate corresponding calendars: the Long Count, the Tzolkin (divine calendar), and the Haab(civil calendar). Each of them is cyclical, meaning that a certain number of days must occur before a new cycle can begin.
The three calendars are used simultaneously. The Tzolkin and the Haab identify the days, but not the years. The Long Count date comes first, then the Tzolkin date, and last the Haab date. A typical Mayan date would read: 184.108.40.206.0 4 Ahau 8 Kumku, where 220.127.116.11.0 is the Long Count date, 4 Ahau is the Tzolkin date, and 8 Kumku is the Haabdate.