Mesoamerican calendrical systems and astronomical observation (Preclassic–Postclassic)

1. Long Count era base date (GMT correlation)

   Aug 11, 3113 BCELabels: Long Count, GMT correlation

   • Long Count

2. Astronomical-architectural calendar evidence emerges (1100–750 BCE)

   Jan 1, 1099 BCELabels: southern Mesoamerica, architectural orientations

   • PNAS

3. San Bartolo “7 Deer” Tzolk’in day record

   Jan 1, 299 BCELabels: San Bartolo, Tzolk in

   • SciAdv

4. Chiapa de Corzo Stela 2 Long Count date

   Dec 6, 35 BCELabels: Chiapa de, Stela 2

   • Chiapa
   • SciAdv

5. Tres Zapotes Stela C records Long Count

   Sep 3, 31 BCELabels: Tres Zapotes, Stela C

   • Tres Zapotes
   • ETHoS

6. El Baúl Stela 1 early Long Count inscription

   Mar 2, 37Labels: El Ba, Stela 1

   • Long Count

7. Takalik Abaj Stela 5 early Long Count dates

   Jun 3, 126Labels: Takalik Abaj, Stela 5

   • Long Count
   • Takalik Abaj

8. La Mojarra Stela 1 Long Count inscriptions

   May 19, 143Labels: La Mojarra, Stela 1

   • Long Count
   • Doczz

9. Tuxtla Statuette bears Long Count date

   Mar 12, 162Labels: Tuxtla Statuette, Veracruz

   • Long Count

10. Tikal Stela 29: earliest dated monument at Tikal

    Jul 8, 292Labels: Tikal, Stela 29

    • Penn Museum
    • Mesoweb

11. Dresden Codex Venus Table encodes 584-day cycle

    Jan 1, 1200Labels: Dresden Codex, Venus Table

    • Venus Table

12. Madrid Codex compiled with divinatory and year-cycle content

    Jan 1, 1400Labels: Madrid Codex, Postclassic Maya

    • Britannica

13. Codex Borgia emphasizes the tonalpohualli (260-day divinatory cycle)

    Jan 1, 1500Labels: Codex Borgia, tonalpohualli

    • Borgia