Muslims in Nigeria's biggest city, Lagos, will hold their Friday prayers in mosques for the first time in nearly four months.
Churches will resume services on Sunday.
All places of worship were closed in March because of the coronavirus pandemic.
Lagos State Governor Babajide Sanwo-Olu said the reopening was a sign of progress in Nigeria's fight against the disease.
The places of worship are only allowed to hold 50% of their full capacity.
Worshippers must also adhere to safety measures, including wearing face masks and social distancing.