This is the
Aztec solar year calendar. It consists of 18 months, with each month equaling 20 days. The last five days of the year were called
Nemontemi, the "barren" or empty days and were considered to be unlucky.
The first day of each month was solemn and no work was allowed, much like Sunday used to be in Christian nations. Each day of the month had a name and a corresponding god/goddess to be honored.
- Day One: Cipactli, for the god Tonacatecuhtli
- Day Two: Ehecatl, for the god Quetzalcoatl
- Day Three: Calli, for the god Tepeyollotl
- Day Four: Cuetzpalin, for the god Huehuecoyotl
- Day Five: Caotl, for the goddess Chalchihuitlicue
- Day Six: Miquiztli, for the god Tecciztecatl
- Day Seven: Mazatl, for the god Tlaloc
- Day Eight: Tochtli, for the goddess Mayahuel
- Day Nine: Atl, for the god Xiuhtecuhtli
- Day Ten: Itzcuintli, for the god Mictlantecuhtli
- Day Eleven: Ozomahtli, for the god Xochipili
- Day Twelve: Malinalli, for the god Patecatl
- Day Thirteen: Acatl, for the god Tezcatlipoca
- Day Fourteen: Ocelotl, for the goddess Tlazolteotl
- Day Fifteen: Cuauhtli, for the god Xipe Totec
- Day Sixteen: Cozcacuauhtli, for the goddess Itzpapalotl
- Day Seventeen: Ollin, for the god Xolotl
- Day Eighteen: Tecpatl, for the god Chalchihuihtotolin
- Day Nineteen: Quiahuitl, for the god Tonatiuh
- Day Twenty: Xochitl, for the goddess Xochiquetzal