Aztec and Maya Calendar
In the tonalpohualli, the sacred Aztec calendar, Saturday December 19, 1545 is:
Xihuitl:
solar year
1 - Calli (house)
Long Count:
Mayan calendar
11.16.6.3.19
Xiuhpohualli:
365-day calendar
16 - Atemoztli (XVII)
(Correlation: Alfonso Caso [adjust])
The significance of this day
Aztec facts
The Aztec, Maya and most other mesoamerican people used the same 260-day calendar with an identical correlation. So the Aztec date 1-Cipactli corresponds to 1-Imix for the Maya, etcetera.
Day Quiahuitl (Rain) is governed by Tonatiuh, the Sun God, as its provider of tonalli (Shadow Soul) life energy. Quiahuitl is a day of relying on the unpredictable fortunes of fate. It is a good day for traveling and learning, a bad day for business and planning.
The thirteen day period (trecena) that starts with day 1-Ollin (Movement) is ruled by Tlazolteotl. This trecena is governed by the goddess of cotton and weaving, of sexuality and childbirth, she who is the eater of sins: it is the sign of the Scavenger, who feeds not on power but on the ills that darken the heart. The rainbow serpent, symbol of pleasure and folly, levitates amidst a shroud of smoke and shadow: these are 13 days of stolen secrets and odd twists of fate. The earth itself shakes: the ills created by shock can sometimes only be cured by greater shock. These are good days for self-purification; bad days for self-gratification.