22 дек 2012 г. до нашей эры - Mayan calendar

Описание:

The Maya calendar consists of several cycles or counts of different lengths. The 260-day count is known to scholars as the Tzolkin, or Tzolk'in. The Tzolkin was combined with a 365-day vague solar year known as the Haab' to form a synchronized cycle lasting for 52 Haab', called the Calendar Round.
Maya calendar - Wikipedia
https://en.wikipedia.org/wiki/Maya_calendar

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