A Galactic Signature is the kin assigned to a person's birth date under the Dreamspell correlation: one of the twenty Solar Seals paired with one of the thirteen Galactic Tones, giving 260 possible signatures, expressed in a formula of the type Tone plus Seal, and elaborated by a further set of relationships, an oracle of guide, analogue, antipode and occult kin drawn from fixed positions in the 260-count. The system presents this as a galactic identity or destiny and encourages users to adopt the signature as a name. The calculation is mechanical: the birth date is converted through the fixed Gregorian correlation, with 29 February omitted, and the resulting kin number read off. Anyone can compute it, and many free calculators do, which is part of the system's reach.
A Galactic Signature in the Dreamspell system is the combination of a Solar Seal, one of twenty, with a Galactic Tone, one of thirteen, calculated from a person's Gregorian birth date through a fixed correlation table Arguelles published with the system in 1990. The arithmetic mirrors the authentic Tzolk'in's own combination of twenty day signs with thirteen numbers, and Dreamspell software and printed "Dreamspell Journals" have circulated widely enough that many people who have never encountered a Maya daykeeper nonetheless know their own Galactic Signature. The calculation itself is internally consistent within Dreamspell's own rules; the issue is not arithmetic error but the separate, non-Maya correlation and count on which the arithmetic runs.