Introduction to Maya Hieroglyphs - Wayeb

Kettunen & Helmke 2011
Appendices
3. Add the GMT-correlation constant (584 285) to the Maya day number to give its corresponding Julian
Day Number (JDN):
MDN: GMT: JDN:
1 406 446 584 285 1 990 731
4. From this JDN, the nearest smaller JDN (in the table below) is then subtracted:
year: JDN: year: JDN:
1 1 721 060 1100 2 122 827
100 1 757 585 1200 2 159 351
200 1 794 109 1300 2 195 876
300 1 830 633 1400 2 232 400
400 1 867 157 1500 2 268 924
500 1 903 682 1600 2 305 448
600 1 940 206 1700 2 341 973
700 1 976 730 1800 2 378 497
800 2 013 254 1900 2 415 021
900 2 049 779 2000 2 451 545
1000 2 086 303 ∗
Julian Day Numbers (JDN) for January 1st in the Gregorian calendar (years AD 1⎯2000).
JDN #1 JDN #2 remainder:
1 990 731 1 976 730 14 001
5. Calculate the number of (365 day) years and days in the remainder number:
remainder: days in a (vague) year: result:
14 001 365
38 years
131 days
6. Take into account the leap days (one every fourth year) and leap centuries (those that are divisible by
400 (i.e. AD 400, 800, 1200, 1600, 2000, etc.) and subtract the number of leap days between AD 700
(closest smaller JDN) and 738 (700 + the division result above):
Closest smaller JDN: division result: leap days to be subtracted: final result:
700
38 years
131 days
-9 days
738 years
122 days
Here the division is 38 years divided by 4 – for which we obtain 9,5. Counting only whole days we thus
obtain 9 days to subtract. Maya Long Count date 9.15.6.14.6 corresponds, therefore, to the 122 th day of the
year AD 738; i.e. May 2 nd AD 738.
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