LUNAR RECKONING
relatively later date, of the artistic tenets of the two greater peoples who environed them. The Nahua and Maya calendars were in all likelihood evolved from the calendar system of that civilised race which undoubtedly existed on the Mexican plateau prior to the coming of the later Nahua swarms, and which in general is loosely alluded to as the "Toltec."
The Mexican Year
The Mexican year was a cycle of 365 days, without any intercalary addition or other correction. In course of time it almost lost its seasonal significance because of the omission of the extra hours included in the solar year, and furthermore many of its festivals and occasions were altered by high-priests and rulers to suit their convenience. The Mexican nexiuhilpilitztli (binding of years) contained fifty-two years, and ran in two separate cycles—one of fifty-two years of 365 days each, and another of seventy-three groups of 260 days each. The first was of course the solar year, and embraced eighteen periods of twenty days each, called "months" by the old Spanish chroniclers, with five nemontemi (unlucky days) over and above. These days were not intercalated, but were included in the year, and merely overflowed the division of the year into periods of twenty days. The cycle of seventy-three groups of 260 days, subdivided into groups of thirteen days, was called the "birth-cycle."
Lunar Reckoning
People in a barbarous condition almost invariably reckon time by the period between the waxing and waning of the moon as distinct from the entire passage of a lunar revolution, and this period of twenty days
