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| YEAR | DATE | EVENT | PRESIDENT | PRIME MINISTER |
| 1975 | 21 march | Republic | gen. Tafari Benti | |
| 1977 | 12 february | col. Mengistu Haile Mariam (II) | ||
| 1987 | 10 september | Popular Democratic Republic | col. Mengistu Haile Mariam (II) | cap. Fikre-Selassie Wogderess |
| 1989 | 8 november | Hailu Yimenu | ||
| 1991 | 26 april | Tesfaye Dinka | ||
| 1991 | 21 may | Tesfaye Gebre Kidan | ||
| 1991 | 28 may | Meles Zenawi | ||
| 1991 | 6 june | Tamirat Layne | ||
| 1995 | 22 august | Federal Democratic Republic | Negasso Gidada | Meles Zenawi |
| YEAR | DATE | EVENT | PRESIDENT | PRIME MINISTER |
| 1996 | 6 february | |||
| 2001 | 8 october | Girma Wolde-Giyorgis | ||
| 2012 | 20 august | Hailemariam Desalegn | ||
| 2013 | 7 october | Mulatu Teshome Wirtu | ||
| 2018 | 2 april | Abiy Ahmed | ||
| 2018 | 25 october | Sahle-Work Zewde |