Maya Long Count to Gregorian Date Converter
Enter a Maya Long Count (baktun.katun.tun.uinal.kin) and instantly get the matching Gregorian calendar date. The Tzolkin (260-day count), Haab (365-day count) and Julian Day Number are shown alongside.
Input
Enter each place of the Maya Long Count (baktun.katun.tun.uinal.kin) to convert it into the matching Gregorian date.
144000 days
7200 days
360 days
20 days
1 days
Long Count entered: 13.0.0.0.0
Result
Gregorian date for Long Count 13.0.0.0.0
December 21, 2012
Friday
Tzolkin
4 Ahau
Haab
3 Kankin
Julian Day Number (JDN)
2,456,283
| Long Count | 13.0.0.0.0 |
|---|---|
| Gregorian date | December 21, 2012 |
| Day of week | Friday |
| Tzolkin (260-day count) | 4 Ahau |
| Haab (365-day count) | 3 Kankin |
| Total days from epoch | 1,872,000 days |
| Julian Day Number (JDN) | 2,456,283 |
How it works
- Enter the five places (baktun, katun, tun, uinal, kin) and the tool counts the total days from the epoch (0.0.0.0.0) and converts them into the matching Gregorian date.
- The Long Count places are counted as 1 baktun = 144,000 days, 1 katun = 7,200 days, 1 tun = 360 days, 1 uinal = 20 days and 1 kin = 1 day. Uinal usually ranges 0-17 and the other lower places 0-19.
- Conversion goes through the Julian Day Number (JDN), mapping the Long Count epoch to JDN 584283 using the GMT (Goodman-Martinez-Thompson) correlation. Other correlation conventions can shift the result by a few days.
- The Tzolkin shown is a 260-day cycle pairing 13 numbers with 20 day names, while the Haab is a 365-day cycle of 18 months (20 days each) plus the 5-day Wayeb.
- As an example, 13.0.0.0.0 (the close of the 13th baktun) corresponds to December 21, 2012 (Friday, 4 Ahau, 3 Kankin).
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Maya Long Count to Gregorian Date Converter