Mayan (Tzolkin)
The 260-day sacred count and Long Count, computed from the GMT correlation constant — a calendar system of remarkable astronomical precision.
Ritual count · 260-day Tzolkin, Long Count correlation
How the math differs
The Mayan count is a ritual calendar built from arithmetic, not planetary longitudes. The Tzolkin interlocks 13 numbers with 20 day-signs to name a repeating 260-day cycle.
The Long Count tallies days elapsed from a mythic zero date and maps to our calendar through the GMT correlation constant (Julian Day 584283) — so a birth date becomes a Long Count by exact day-counting.
Because everything is integer day-counting anchored to one correlation constant, the calendar is reproducible to the day across millennia.
What you can compute
Tzolkin day-sign
260-day sacred count from the birth date
Long Count
Days from the zero date via the GMT correlation (JD 584283)
Calendar Round position
Tzolkin and Haab locked to the day
See what the engine already computes
This tradition is on the roadmap. Start with a live system today from the same open-source, arc-second ephemeris core.