Aztec Tōnalpōhualli (阿茲特克聖曆)

Tōnalpōhualli — the 260-day Aztec (Mexica) sacred count, the Maya Tzolkʼin's twin under the same GMT-584283 correlation (1 Imix = 1 Cipactli). Converts a birth date into the day-name signature (e.g. 9 Malīnalli): day-sign (1 of 20 tōnalli), day-number (1–13), trecena (13-day wave) with its patron deity, the presiding Lord of the Night (Yohualtēuctli), and the Lord of the Day (Tōnaltēuctli) with its paired Volatile (bird / 'flyer') — the full tonalamatl ruler set — with a synthesised profile.

Cost: 1 TIAN Points per call. tRPC procedure aztec.tonalpohualli.