出典:Wikipedia
出典:『Wikipedia』 (2011/02/02 20:44 UTC 版)
In the Mesoamerican calendars, Calendar Round dates are composed by interlacing the dates of a 260-day period (Tzolk'in in the Maya Calendar, Tonalpohualli in the Aztec calendar) with dates from a 365-day period (known in the Maya language as the Haab' and in Nahuatl as Xiuhpohualli). One Calendar Round cycle thus includes 18980 distinct dates and lasts approximately 52 years (the least common multiple of 260 and 365 is 18980).
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