To: fringeware
From: fringeware
Subject: Mayan Calendrics

             ***  Mayan Calendrics  ***

"The program has already been of great help to me in checking the
calculations on the texts from my site, Rio Azul ... Congratulations
on working out a very useful program."    Professor R. E. W. Adams
Professor of Anthropology, The University of Texas at San Antonio

"Dolphin Software offers the best available computer software which
correlates the tzolkin/haab and Long Count with Gregorian and Julian
calendars.  I highly recommend it to all students of calendars, time,
the Maya, Aztecs and history in general.  Using it has really been for
me like using a crystal ball - one really can get a feel for the
subtle rhythms of the Sacred Calendar."John M. Jenkins, "Tzolkin"

This software is indispensable for Maya scholars and for anyone
interested in the Maya calendar.  It converts dates in the Maya
calendar to and from Western dates.  Maya dates may be either dates in
the sacred and civil calendars (the so-called tzolkin/haab dates, for
example, 13 Imix 19 Kayab) or long count dates (for example, 9.9.16.0.0).
Western dates may be expressed in either the Gregorian calendar or the
Julian.  A date expressed in any calendrical system is automatically
converted to dates in all the others (and to the astronomical Julian
day number).  Arithmetic operations with long count dates are supported.

Mayan Calendrics uses the correlation number (the Julian day number of
0.0.0.0.0  4 Ahau 8 Cumku, which determines the relation between the
Maya and Western calendars) recommended by Sir J. Eric S. Thompson,
but allows use of any desired correlation number.  The software also
allows use of different year-bearer systems (three different year-bearer
systems were used by the Mayas at various times and places) and allows
specification of the number (0 or 1) of the first day in the Maya haab
month.  It may thus be used with Maya dates from the Dresden, Paris
and Madrid codices and with dates from other sources.

When a tzolkin/haab date is entered the software displays which
year-bearer systems it is consistent with, and allows identification
of all Western dates within a given range of years which correspond to
that tzolkin/haab date.

Mayan Calendrics Version 3.33 has detailed help and information
screens, optional output to printer or disk file and comes with a
37-page explanation and commentary.  A 110-item bibliography is
included.  The software runs on both color and monochrome PCs with
DOS 3.00 or later.  Produced by Dolphin Software.

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By Paco Xander Nathan, distributed to the FringeWare mailing list.
For info, email fringeware@wixer.cactus.org.