Ndigbo invented the most accurate calendar called Iguafo Igbo (Igbo Calendar). This traditional calendar is based on the lunar calendar and is comprised of four market days (Eke, Orie, Afo and Nkwo), 28 days per month, seven weeks per month, thirteen months a year, and all together, a total of 364 days per lunar year.
The beginning and ending of the year are marked in July. The solar and approximate/comparable lunar months are as follows:
Lunar months | solar months |
Önwa-mbü | July |
Önwa-abö | August |
Önwa-atö | September |
Önwa-anö | October |
Önwa-ise | November |
Önwa-isii | December |
Önwa-asaa | December/January |
Önwa-asatö | February |
Önwa-itolu | March |
Önwa-iri | April |
Önwa-iri na otu | May |
Önwa-iri na atö | June |
Önwa-iri na anö | Thirteenth month |
