Aztec and Maya Calendar
In the tonalpohualli, the sacred Aztec calendar, Thursday April 22, 1937 is:
(1 -) Quiahuitl (rain)
3 - Calli (house)
Lord of the Night
20 - Hueitecuilhuitl (VIII)
(Correlation: Alfonso Caso - Nicholson's veintena alignment [adjust])
The significance of this day
5-Calli is the name day of Macuilcalli, a patron god of the jewel workers.
Day Calli (House) is governed by Tepeyollotl, Heart of the Mountain, as its provider of tonalli (Shadow Soul) life energy. Calli is a good day for rest, tranquility and family life. Not a good day for participating in public life. Best spent cementing relationships of trust and mutual interests.
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.
Jack Nicholson was born on day 5-Calli.
In the years after the conquest of Mexico, the xiuhpohualli (solar calendar) became tied to the Julian calendar as used by the Spaniards. This effectively introduced a leap year to the Aztec calendar every four years (this site provides the pre-conquest calendar).