Sak

Sak is the eleventh of the nineteen periods of the Haab, the 365-day Maya solar calendar. Recorded here by its Yucatec name, Sak, glossed as the white storm, sak meaning white, the month is known from the colonial sources and, in its glyphic form, from the Classic inscriptions. Like each of the eighteen full months it counts twenty days, and a Maya date names a day by its position within the month alongside the interlocking Tzolk'in day sign and number. Sak is the third of the colour-named run of months, Chen, Yax, Sak, and Keh, whose glosses join a colour to the sense of storm or the turning year. These are the features of the Maya solar calendar, built of eighteen twenty-day months and a closing five-day period and meshed with the 260-day sacred count in the fifty-two-year Calendar Round.

Sak, the eleventh month, is generally translated as white, one of the four colour-direction terms, alongside red for east, black for west and yellow for south, that recur throughout Maya cosmology to mark the cardinal points, white conventionally associated with the north. Whether the month name's colour sense was intended to carry that directional symbolism, or is instead a coincidental homophone with a separate meaning lost to the record, is not settled among epigraphers, and this atlas notes the ambiguity rather than asserting the directional reading as fact. Diego de Landa's account of the Yucatec ritual year does not single out Sak with a distinctively documented ceremony beyond the general pattern of renewal observed across the calendar's middle months, and the month's Classic-period glyph is likewise not conclusively tied to a colour-direction rite.

Sak is the white storm, the third of the four colour-marked months. White is the colour of the north in the Maya directional scheme, and sak also carries the sense of bright, clean and artificial, so the month name has a range in Mayan that a single English word does not reproduce.

The eleventh month sits in the second half of the eighteen and, like all the full months, runs twenty days from its seating. Since a full month is exactly the length of the day-sign cycle, its seating always carries the same Tzolk'in day sign as every other month seating in the same year, which is the Year Bearer of that year, and a reader who knows the bearer can derive the day sign of any date in the year from the Haab position alone.

That derivation is a genuine convenience rather than a curiosity, and it is one reason the Calendar Round is workable in the head. What it does not give is the day number, since the thirteen Tzolk'in numbers and the 365 days of the Haab share no common factor and every number can therefore fall on every Haab position over the course of the Round.

It is worth adding that this convenience is a property of the eighteen full months only. The five days of the Wayeb break the twenty-day alignment, so the rule holds within a year and not across the seam, and it is precisely the break that makes the year advance to the next bearer. A structure that repeated exactly would produce no year names at all.