Oc is the tenth of the twenty day signs of the Tzolk'in, the 260-day sacred count of the Maya, kept by living daykeepers and reconstructed for the Classic period from the inscriptions. Recorded here by its Yucatec name, Oc, it corresponds to the day Tz'i' in the living K'iche' tradition. Its imagery is the dog, loyalty, guidance, and companionship, and the dog that in Maya belief leads the soul across the waters to the underworld; the K'iche' Tz'i' also carries the sense of authority and law. In the directional scheme that runs through the twenty signs it belongs to the north and the colour white. These are the meanings the Maya calendrical tradition carries for the day, presented as that living and reconstructed tradition frames them.
Oc is the tenth of the twenty Tzolk'in day signs; the living K'iche' tradition knows the corresponding day as Tz'i', the word for dog in K'iche', matching the Yucatec sign's own association with the dog and, by extension, with loyalty, guidance and law. Dogs held a documented role in Maya belief as guides for the soul through the underworld, Xibalba, an association attested in Classic-period iconography showing dog figures accompanying the dead, and echoed independently in the unrelated Aztec belief that the dog-headed god Xolotl guided souls to the underworld, a parallel between two distinct Mesoamerican traditions rather than evidence of one borrowing from the other. In the directional scheme, Oc belongs to the north and the colour white.