Issues regarding the predictions and prophecies written in the ancient Mayan calendar has influenced a lot of scientists, experts, astronomers and other religious organizations. Most of the individuals are very doubtful about what's written in the calendar. Knowing what in the ancient Mayan calendar is very important before making any doubts and criticism.
The Tzolk'in is known to be the 260-day cycle sacred calendar, and is considered to be the oldest one in Mesoamerica during 600 BC. Whilst there are a number of scholars who still doing research on the astronomical foundation of this cycle, most of them agree that it was based on the period of pregnancy of human beings.
The Haab, or the "vague" year, is the calendar that has similar features with the Christian calendar. With a 365 days cycle, it is obviously based on the solar observations. It's the "vague" year because it does not have any leap year.
The Long Count
The Long Count is typically considered the Mayan's linear count of the days. The truth about this calendar is, it has 5126 years, which creates the linear count in all the period of Mayan history.
The Lunar Series
The Lunar Series was the first original contribution to the Mayan calendar. More or less this was utilized in 3rd century AD that displayed as a sequence of four to six glyphs used in counting lunar days, which divided in six lunations with 29 or 30 days each.
Although, the ancient Mayan calendar made the solar calendar called Haab, the rest of the Mesoamerica culture used Year Bearers to identify the individual solar names in the 365-days cycle.
Maya Birthday Divination
Every individual is said to have their own destiny and personality traits according to the sign of the day they are born. The Maya information here came from a variety of sources, but mostly came from the highlands of Guatemala.
The Correlation Debate
Over the period of studies for ancient Mayan calendar, a wide range of Christian calendar correlated dates have been given.
Given the different types of the ancient Mayan calendar, you already have an idea on what is written in these calendars. Therefore, if you want to more about Mayan calendar predictions and prophecies, you might browse any publications online.