GMT Maya (584283)
What it is
The Goodman–Martínez–Thompson correlation, which anchors the Maya Long Count. It has no arithmetic of its own: it is declared in the code as a copy of Caso with the same offset, and it therefore gives the same tonal every day, without exception.
Why it does not fit the others' formula
There is no sealed algorithm for GMT among the six, and that is not an oversight: there is nothing to seal that is not already in Caso's.
How to cite this page
Alma Mexica, «GMT Maya (584283)», The five counts. Last revised 2026-09-17. https://almamexica.org/en/counts/gmt/