The Xiuhpohualli is the 365-day solar calendar used by the Aztec civilization, which structured their agricultural, religious, and social activities. This calendar was fundamental in organizing time and festivals, connecting the cycles of nature with the spiritual life of the Aztec people. The Xiuhpohualli consisted of 18 months with 20 days each, plus an additional short month, providing a framework for the timing of rituals and agricultural cycles.
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