07104. MAYAN AND AZTEC CALENDAR SYSTEMS. Comprehensive overview of early Meso-American calendars, which were as accurate as any pre-telescope calendars. The 260 and 365-day cycles; the Mayan Long Count of years; the problem of the Mayan year 1; Mayan systems for tracking the moon and Venus; correlating Mayan years to our system; latter-day Mayan and Aztec systems; role of calendars and astrology in Mayan and Aztec civilizations. 16 pages, 29 footnotes, 4 bibliographic sources.