How the Mayan calendar counts days
The tzolkin combines twenty day signs with thirteen numbered tones to produce a 260 day cycle, so your sign is a pairing rather than a single symbol. The long count is a separate running total of days used for dating historical events.
Correlating a modern date with the tzolkin requires choosing a correlation constant, and different sources use slightly different ones. We use the widely accepted GMT correlation and say so.
Aztec signs and nahuales
The Aztec calendar shares its structure with the Mayan one and overlaps heavily in its day signs, with different names and slightly different associations. A nahual is the animal companion assigned by the day of birth.
These readings describe character in the terms the tradition itself used, which are often blunter than modern horoscope language.