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Chac is a complete, accurate Maya calendar application.

Chac can find Maya calendar dates based on today's date, any date, a Long Count, Tzolk'in, Haab', Calendar Round, Julian day number, distance number, long reckoning , seatings in the cycle of God K and convert between the Julian and Gregorian calendars. Chac can find the next heliacal or cosmical rising or setting of Venus and the visibility of the current inscription or date

Chac calculates the day of the week, Gregorian or Julian date, Julian day number, the Year Bearer, cycle of God K, Long Count, Tzolk'in, Haab', nine Lords of the Night, lunar more...

What's New

Version 2.4.9:
  • This update fixes a bug that caused the wrong illustration to be displayed for two of the 819 cycles when the God K option was selected.


  • OS X 10.6.6 or later

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Current Version (2.x)


Downloads 13,999
Version Downloads 12
License Commercial
Date 15 Nov 2015
Platform Intel 64 / OS X
Price $9.99
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