Mesoamerican Long Count calendar the use of zero as a place-holder and presents one of the earliest uses of the zero concept in history. On Maya monuments, the Long Count syntax is more complex. The date sequence is given once, at the beginning of the inscription and opens with the so-called ISIG (Introductory Series Initial Glyph) which reads "tzik-a(h) hab’ [patron of Haab' month]" ("revered was the year-count with the patron [of the month]"). Next come the 5 digits of the Long Count, followed by the Calendar Round (tzolk'in and Haab') and supplementary series. The supplementary series is optional and contains lunar data, for
Yoruba calendar Yoruba calendar The Yoruba calendar ("Kojoda") is a calendar used by the Yoruba people of southwestern Nigeria and southern Benin. The calendar has a year beginning on the last moon of May or first moon of June of the Gregorian calendar, and an era of 8042 BC. The new year coincides with the Ifá festival The traditional Yoruba week has four days. The four days that are dedicated to the Orisa go as follow: To reconcile with the Gregorian calendar, Yoruba people also measure time in seven days a week and four weeks a month. The four-day calendar was dedicated