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
Igbo calendar planting season when the king, the "Eze Nri" in the Nri area, tells the Igbo to go and sow their seed after the next rainfall, and the Harvest festival (') in the eighth month. The Nri-Igbo yearly counting festival known as "" marked 10 March 2012 as the beginning of the 1013th year of the Nri calendar. The festival was delayed due to other events. Imöka is celebrated on the 20th day of the second month. Igbo calendar The Igbo calendar () is the traditional calendar system of the Igbo people from present-day Nigeria. The calendar has 13 months in