Calabar Carnival, Osun-Osogbo, Argungu, Durbar and other living calendars.
Festivals are Nigeria thinking out loud: horse parades in the north, sacred groves in Osun, carnival streets in Calabar, fishing competitions on the Niger, new-yam thanksgivings in the east.
Use them as a travel list, then open the matching state page for the history that makes the music make sense.