Aztec and Maya Calendar
In the tonalpohualli, the sacred Aztec calendar, Tuesday February 14, 1520 is:
Xihuitl:
solar year
2 - Tecpatl (flint knife)
Xiuhpohualli:
365-day calendar
1 - Cuauhuitlehua (I)
Long Count:
Mayan calendar
11.14.19.17.19
(Correlation: Alfonso Caso - Nicholson's veintena alignment [adjust])
The significance of this day
Day 1 - Quiahuitl is influenced by the Cihuateteo.
This is the first day of a new solar year (xihuitl).
Day Quiahuitl (Rain, known as Cauac in Maya) 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-Quiahuitl (Rain) is ruled by Tlaloc, He Who Makes Things Sprout, god of rain, lightning and thunder. This trecena represents a time of alternating drought and flood. There is either not enough or too much. It is a time of hardship and suffering. The rainmaker stands alone atop the mountain, holding firesticks and a medicine bundle: help will be offered but may not be accepted. Some will have prepared for this time but not enough to care for everyone in need. These are good days to pursue solitude and learning; bad days to count on others.
Aztec facts
The Aztecs did not use a leap year correction but they knew the length of a solar year is neither 365 nor 365.25 days. Presumably they kept some count of days to register astronomical events but no evidence of an Aztec Long Count exists.