This is the first account, the first narrative. There was neither man,
nor animal, birds, fishes, crabs, trees, stones, caves, ravines, grasses,
nor forests; there was only the sky.--The Popol Vuh, sacred book of
the Quiche Maya.
In learning a new programming language, toolkit, or library, some
people write "Hello, World". One I knew would write a hex dump utility.
I calculate Mayan dates. Probably my very first real programming effort
involved taking a Mayan date calculator written in FORTRAN and re-creating
it in C. Since then I've rewritten it many times, and used the basic code
as the core for implementing a prototype to learn new things, including
web CGIs, servlets, Mozilla XPCOM, Web Services, and more. It was
the natural choice for my foray into FIT.
The Mayans knew about 0 and counted in base 20. This page really can't do
justice to the Mayan date system. Read
more about Mayan calendar systems.
Unless otherwise noted, expected values are those generated with the
Maya Long
Count Date Generator
If you are interested in duplicating these results in your own code, you'll
want to get a good reference on basic date conversions. Start by generating
Julian day from a Gregorian calendar date. Use the Julian day to generate
the Mayan dates. Probably the best technical reference on the web is at
Maya World Studies Center.
Here is the input document
| com.cmdev.maya.MayaFixture |
| gregorianDate |
correlationConstant |
round() |
longCount() |
julian() |
| June 30, 1964 |
584283 |
4 Ix 17 Zotz |
12 . 17 . 10 . 14 . 14 |
2438577 |
| June 30, 1964 |
584285 |
2 Eb 15 Zotz |
12 . 17 . 10 . 14 . 12 |
2438577 |
| December 21, 2012 |
584283 |
4 Ahau 3 Kankin |
13 . 0 . 0 . 0 . 0 |
2456283 |
| com.cmdev.maya.MayaFixture |
| julianDate |
correlationConstant |
round() |
longCount() |
gregorian() |
| 2369916 |
584283 |
9 Ben 16 Uo |
12 . 8 . 0 . 1 . 13 |
July 4, 1776 |
| 2299161 |
584283 |
13 Etznab 11 Tzec |
11 . 18 . 3 . 9 . 18 |
October 15, 1582 |
A clean run should result in the following
| com.cmdev.maya.MayaFixture |
| gregorianDate |
correlationConstant |
round() |
longCount() |
julian() |
| June 30, 1964 |
584283 |
4 Ix 17 Zotz |
12 . 17 . 10 . 14 . 14 |
2438577 |
| June 30, 1964 |
584285 |
2 Eb 15 Zotz |
12 . 17 . 10 . 14 . 12 |
2438577 |
| December 21, 2012 |
584283 |
4 Ahau 3 Kankin |
13 . 0 . 0 . 0 . 0 |
2456283 |
| com.cmdev.maya.MayaFixture |
| julianDate |
correlationConstant |
round() |
longCount() |
gregorian() |
| 2369916 |
584283 |
9 Ben 16 Uo |
12 . 8 . 0 . 1 . 13 |
July 4, 1776 |
| 2299161 |
584283 |
13 Etznab 11 Tzec |
11 . 18 . 3 . 9 . 18 |
October 15, 1582 |
| fit.Summary |
| counts |
15 right, 0 wrong, 0 ignored, 0 exceptions |
| input file |
/home/sen/src/antfit/fitdocs/MayanCalendar.html |
| input update |
Sat Apr 26 19:14:50 PDT 2003 |
| output file |
/home/sen/src/antfit/build/tests/MayanCalendar.html |
| run date |
Sat Apr 26 19:29:36 PDT 2003 |
| run elapsed time |
0:00.04 |