The most reliable source on Itzamná, Diego de Landa, mentions him several times in the framework of his description of the ritual year. In the month of Uo, a ritual aspersion of the books took place under invocation of Kinich Ahau Itzamná, "the first priest". In the month of Zip, Itzamná was invoked as one of the gods of medicine, and in the month of Mac, he was venerated by the very old on a par with the Chaacs, the rain deities. In the cycle of four years, one year was under the patronage of Itzamná.
the most reliable source on itzamná diego de landa mentions him several times in the framework of his description of the ritual year in the month of uo a ritual aspersion of the books took place under invocation of kinich ahau itzamná "the first priest" in the month of zip itzamná was invoked as one of the gods of medicine and in the month of mac he was venerated by the very old on a par with the chaacs the rain deities in the cycle of four years one year was under the patronage of itzamná