| 2024-05-20 | Yucatán people of old |
| 2020-09-13 | Yucatán natives |
| 2018-07-07 | Early people who used a base-20 numerical system |
| 2015-05-27 | Mexican pyramid builders |
| 2006-03-03 | Ancient writers of hieroglyphics |
| 2002-06-02 | Early calendar developers |
| 2002-04-09 | Central American Indians |
| 2002-01-31 | Yucatán natives |
| 2000-12-12 | Yucatán natives |
| 2000-05-22 | Central American Indians |
| 2000-01-07 | Noted pyramid builders |
| 2000-01-06 | Pioneers of a 365-day calendar |
| 1996-12-07 | Tikal dwellers |
| 1995-06-29 | Uxmal residents |
| 1994-08-15 | Yucatan people |
| 1994-03-19 | Pyramid builders |