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| YEAR | DATE | EVENT | PRESIDENT | PRIME MINISTER | GENERAL GOVERNOR |
| 1960 | 1 october | Independent into Commonwealth | queen Elisabeth II | Sir Abubakar Tafawa Balewa | Sir James Wilson Robertson |
| 1960 | 16 november | Benjamin Nnamdi Azikiwe | |||
| 1963 | 1 october | Federal Republic | Benjamin Nnamdi Azikiwe | Sir Abubakar Tafawa Balewa | |
| 1966 | 15 january | Mallam Dipchairina | |||
| 1966 | 16 january | Johnson Aguiyi-Ironsi | - | ||
| 1966 | 24 may | Republic | |||
| 1966 | 1 august | gen. Yakubu Gowon | |||
| 1966 | 1 september | Federal Republic | |||
| 1975 | 29 july | Murtala R. Muhammad | |||
| 1976 | 14 february | gen. Olusegun Obasanjo (I) | Shehu Musa Yar Adua | ||
| 1979 | 1 october | Alhaji Shehu Shagari | - | ||
| 1983 | 31 december | gen. Mohammed Buhari (I) | |||
| 1985 | 27 august | gen. Ibrahim Babangida | |||
| 1993 | 26 august | Ernest Shonekan | |||
| 1993 | 17 november | gen. Sani Abacha | |||
| 1998 | 9 june | gen. Abdulsalami Abubakar | |||
| 1999 | 29 may | gen. Olusegun Obasanjo (II) | |||
| 2007 | 29 may | Umaru Musa Yar'Adua | |||
| 2010 | 6 may | Goodluck Jonathan | |||
| 2015 | 1 april | gen. Mohammed Buhari (II) | |||
| 2023 | 25 february | Bola Tinubu |