Aztec VS Mayans
The Aztec calendar is the calendar system that was used by the Aztecs as well as other Pre-Columbian peoples of central Mexico. It is one of the Mesoamerican calendars, sharing the basic structure of calendars from throughout ancient Mesoamerica.
The calendar consisted of a 365-day calendar cycle called xiuhpohualli (year count) and a 260-day ritual cycle called tonalpohualli (day count). These two cycles together formed a 52-year "century, " sometimes called the "calendar round". The xiuhpohualli is considered to be the agricultural calendar, since it is based on the sun, and the tonalpohualli is considered to be the sacred calendar.
The calendric year may have begun at some point in the distant past with the first appearance of the Pleiades (Tianquiztli) asterism in the east immediately before the dawn light. But due to the precession of the Earth's axis, it fell out of favor to a more constant reference point such as a solstice or equinox. Early Spanish chroniclers recorded it being celebrated in proximity with the Spring equinox.The Center of the Disc - Tonatiuh
Tonatiuh's Face is the face of the sun, Lord of Heaven, around which takes place all daily and periodic phenomena. The crown, nose-pendant, ear-rings and necklace are magnificent, as must be the ornaments characteristic of this deity. The hair is blond, due to the golden appearance of the sun. The wrinkles on the face show age and maturity. And the tongue, stuck out is the form of an obsidian knife, indicates that the diety demands to be fed with blood and human hearts.The Rings
First Ring - from Center. Four Olin representing the Earthquake Epoch or Sun. The four epochs represented inside the square portions of this symbol correspond to the four previous epochs also called suns.
Second Ring - The second ring from the center is composed of 20 named days contained in one month, also used for naming years. Each year starts on one of four of these 20 days.
Third Ring - Sun Rays - Chalchihuite Ornaments - Splashed Blood Symbols
Outer Ring - Dedication Plate - Herbs with Buds - White Scrolls - Flame Sign - Xiucoatl's Tail
The tonalpohualli (count of days) was the sacred almanac of the Mexicas. This ritual calendar was registered in the tonalamatl (book of days), a green-fold bark paper or deerskin codex from which a priest (called tonalpouque) cast horoscopes and predicated favorable and unfavorable days of the cycle.