What was an unlucky day in the Aztec times?

In Aztec times, an unlucky day was often associated with the calendar system known as the Tonalpohualli, which comprised 260 days. Specific days, such as those associated with the "Tochtli" (rabbit) and "Mazatl" (deer), were considered particularly inauspicious. Rituals and ceremonies were avoided on these days to prevent misfortune, illness, or disaster, as they were believed to bring bad luck or anger the gods. The interpretation of luck varied, but these designations played a significant role in daily life and decision-making.