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| YEAR | DATE | EVENT | PRESIDENT | PRIME MINISTER |
| 1964 | 27 april | Federal Republic | Julius Kambarage Nyerere | |
| 1972 | 17 february | Rashid Kawawa | ||
| 1977 | 13 february | Edward Moringe Sokoine (I) | ||
| 1980 | 7 november | Cleopa David Msuya (I) | ||
| 1983 | 24 february | Edward Moringe Sokoine (II) | ||
| 1984 | 24 april | Salim Ahmed Salim | ||
| 1985 | 5 november | Ali Hassan Mwinyi | Joseph Warioba | |
| 1990 | John Malecela | |||
| 1994 | 7 december | Cleopa David Msuya (II) | ||
| 1995 | 23 november | Benjamin William Mkapa | Frederick Sumaye | |
| 2005 | 21 december | Jakaya Kikwete | Edward Lowassa | |
| 2008 | 9 february | Mizengo Pinda | ||
| 2015 | 5 november | John Magufuli | ||
| 2015 | 20 november | Kassim Majaliwa | ||
| 2021 | 19 march | Samia Suluhu Hassan |