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| YEAR | DATE | EVENT | PRESIDENT | PRIME MINISTER |
| 1997 | 11 august | Independent | Said Mohamed Soefou | Soidri Ahmed |
| 1998 | Union to Comoros | |||
| 2002 | 10 march | Federate state of the Union of Comoros | Mohamed Said Fazul (I) | |
| 2007 | 1 july | Mohamed Ali Said | ||
| 2016 | 22 may | Mohamed Said Fazul (II) |