There are twenty named days contained in one month. Each day also names the years.

cipactli: crocodile
ehecatl: wind
calli: house or underworld
cuetzpallin: lizard
coatl: serpent or snake
miquiztli: death
mazatl: deer
tochtli: rabbit
atl: water
itzcuintli: dog
ozomatli: monkey
malinalli: herb: grass
acatl: reed
ocelotl: jaguar
quauhtli: eagle
cozcaquauhtli: vulture
ollin: movement
tecpatl: flint knife
quiauitl: rain
xochitl: flower