1900-01-01:

1914-01-01:

1953-01-01:

1960-10-01:

1900-01-01:

1914-01-01:

1953-01-01:

1960-05-20:

1978-01-01:

1900-01-01:

UNITED KINGDOM

1960-10-01:

NIGERIA +

UNITED KINGDOM +

1963-10-01:

NIGERIA

1900-01-01:

  Duke Town + Lagos + Lokoja

1902-01-01:

  Old Calabar + Lagos + Lokoja

1904-01-02:

  Calabar + Lagos + Lokoja

1914-01-01:

  Lagos

1976-03-17:

  Lagos + Abuja

1991-12-12:

  Abuja + Lagos

1994-01-07:

  Abuja

1900-01-01:

  BRITISH NIGERIA

1914-01-01:

  NIGERIA

1900-01-01:

1906-02-16:

1914-01-01:

1954-10-01:

1960-10-01:

1963-10-01:

1966-01-16:

1966-05-24:

1966-08-01:

1966-08-31:

1979-10-01:

1983-12-31:

1985-08-27:

1960-10-01:

1963-10-01:

1966-01-16:

1966-08-01:

1975-07-29:

1976-02-14:

1979-10-01:

1983-12-31:

1985-08-27:

1993-08-26:

1993-11-17:

1998-06-09:

1999-05-29:

2007-05-29:

2010-05-05:

2015-05-29:

2023-05-29: