The Igbo Calendar presents a comparative analysis of the Igbo calendar, Gregorian calendar, and other world calendars. It gives insight into the origin of Igbo calendar dealing with the origin of the four Igbo market days (EKE, ORIE, AFO, and NKWO). It portrays the calendar as 112 Reference Charts from AD 0001 to AD 8064 with each reference chart showing 72 related years with identical Igbo market days and Gregorian week days which co-jointly repeat every 112 years. It also gives guidance on how to read and use the calendar. The book pioneers a critical basis and guide for further research into the origin, nomenclature and applicability of the Igbo Calendar in contrast to the Gregorian calendar. It pioneers a critical basis and guide for further research into the origin, nomenclature and applicability of the Igbo Calendar in contrast to the Gregorian calendar. The book also contains the Map of Igboland, and two poems- The Last Words of Adam to Eve before partaking of the Forbidden Apple, and Eagle is King of the Birds, both written by the author. The Igbo Calendar is a sound penetrating and well-researched original work that should be in the hands of all grades of readers. Seekers of the footprints of Igbo history and culture should find it absorbing and relevant.