The new moon marking end of Ramadan has been seen.
Mr Ishaq Oloyede, Secretary General of Supreme Council for Islamic Affairs (NSCIA) said Sultan of Sokoto, Mr Saad Abubakar, will make an official announcement on Monday night.
The Sultan is the head of NSCIA.
The moon was seen in Damaturu and another town, Oloyede, a professor JAMB Registrar, said.
The new moon marks the end of the 29 days of Ramadan fast for Muslims.
Today (Tuesday) will, thus, be the first day of the Islamic month of Shawwal and the celebration of Eid-el-fitr.