cualli tonalli.

a good day, a propitious day for doing something in particular (in the Mesoamerican calendar)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 9 -- The Merchants, No. 14, Part 10, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1959), 56.