Nemontemi

In the Mesoamerica culture, the nemontemi was the five days between two year cycles, or between 52 year calendar rounds (xiuhmolpilli in Nahuatl, "New Fire ceremony"). It was also called baldíos (wasted).

As appears in the Codex Tovar:^[1]

estos cinco dias ultimos le llamavan quiauitl o dia nemontemi q' quiere dezir cinco dias valdios del mes quiauitl e dia q e es el pasado en es tos cinco dias no habia cosa alguna ni acudia al templo, solo se ocupaban de visitarse unos a otros

—Codex Tovar

Every month had 20 days and at the end of the cycle, adding up 360 days. The five days remaining adjusted the next following calendar round.

References