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| YEAR | DATE | EVENT | HEAD OF STATE | PRIME MINISTER |
| 1962 | 1 january | Western Samoa Republic | king Malietoa Tanumafili II and Tupua Tamasese Mea'ole | Mata'afa Mulinu'u II (I) |
| 1963 | 5 april | king Malietoa Tanumafili II | ||
| 1970 | february | Tupua Tamasese Lealofi IV (I) | ||
| 1973 | march | Mata'afa Mulinu'u II (II) | ||
| 1975 | 21 may | Tupua Tamasese Lealofi IV (II) | ||
| 1976 | 24 march | Tupuola Taisi Tufuga Efi (I) | ||
| 1982 | 13 april | Va'ai Kolone (I) | ||
| 1982 | 18 september | Tupuola Taisi Tufuga Efi (II) | ||
| 1982 | 31 december | Tofilau Eti Alesana (I) | ||
| 1985 | 30 december | Va'ai Kolone (II) | ||
| 1988 | 8 april | Tofilau Eti Alesana (II) | ||
| 1997 | 4 july | Samoa Republic | ||
| 1998 | 23 november | Tuilaepa Sailele Malielegaoi | ||
| 2007 | 29 june | Tuiatua Tupua Tamasese Efi | ||
| 2007 | 21 july | Tuimaleali'ifano Va'aletoa Sualauvi II |