Capital: Abuja has been the capital of Nigeria since December 12, 1991. Previously, the capital was Lagos. Major Cities: According to preliminary results of the 2006 census and subsequent estimates, the most populous cities in Nigeria are Lagos (about 8 million), Kano (3.8 million), Ibadan (2.6 million), Kaduna (1.7 million), Port Harcourt (1.3 million), and Benin City (1.1 million). Independence: Nigeria achieved independence from the United Kingdom on October 1, 1960. Public Holidays: A national holiday commemorating independence is celebrated on October 1. Other holidays are New Year's (January 1), Eid al Kabir (Feast of the Sacrifice-movable date based on the Islamic calendar), Eid al Maulud (Birth of the Prophet-movable date based on the Islamic calendar), Easter (movable date in March or April), Workers' Day (May 1), Eid al Fitr (End of Ramadan-movable date based on the Islamic calendar), Christmas (December 25), and Boxing Day (December 26).