Sources: The Guardian, The Hindu, The Q++ Sun Moon and Planets Calculator, and Nigeria public holidays. While most Muslim countries began the month of Ramadan yesterday (with a few such as India and Pakistan beginning today), Nigeria began the month of Ramadan on Wednesday (as did Libya).
Since Muslim months can have either 29 or 30 days, the early start of Ramadan in Nigeria, and the fact that the New Moon will occur at 7am in Lagos with a 10-minute interval between sunset and moonset, makes it likely that Nigeria will declare the beginning of the month of the subsequent month of Shawwal (the Eid al Fitr public holiday) on October 12, rather then October 13 or 14 as will be the case for most other Muslim countries.