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| YEAR | DATE | EVENT | HEAD OF STATE | PRIME MINISTER | GENERAL GOVERNOR |
| 1922 | 6 december | Dominion | king George V | William Thomas Cosgrave | Timothy Michael Healy |
| 1928 | 31 january | James McNeill | |||
| 1932 | 9 march | Eamon de Valera (I) | |||
| 1932 | 27 november | Domhnall Ua Buachalla | |||
| 1936 | 11 december | king George VI | Francis "Frank" Patrick Fahy |
| YEAR | DATE | EVENT | HEAD OF STATE | PRIME MINISTER |
| 1937 | 29 december | Republic into Commonwealth | Timothy Sullivan | Eamon de Valera (I) |
| 1938 | 25 june | Douglas Hyde | ||
| 1945 | 25 june | Sean Thomas O'Kelly | ||
| 1948 | 18 february | John Aloysius Costello (I) |