THE Aztecs of ancient Mexico measured time with a sophisticated and interconnected triple calendar system which followed the movements of the celestial bodies and provided a comprehensive list of important religious festivals and sacred dates. Each day in the calendar was given a unique combination of a name and a number.

In addition, both individual days and periods of days were given their own gods in the calendar, highlighting theAztecview that time and daily life was inseparable from religious beliefs. The date, every 52 years, when the calendars coincided exactly was regarded as particularly significant and auspicious.

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