| Date | | | |
| 23-Dec-1920 | | The Government of Ireland Bill received the Royal Assent. | |
| 1-Apr-1921 | | Curfew hours altered to altered from 8 p.m. till 5 a.m. | |
| 1-Apr-1921 | | Lord Edmund Talbot (Viscount FitzAlan) appointed Lord Lieutenant of Ireland on resignation of Viscount French. | |
| 19-Apr-1921 | | Government of Ireland Act came into operation. | |
| 2-May-1921 | | Viscount FitzAlan sworn in as Lord Lieutenant of Ireland. | |
| 5-May-1921 | | Informal Conference at Mansion House, Dublin, between Mr. De Valera and Sir James Craig, Bt., Prime Minister of Northern Ireland. | |
| 12-May-1921 | | Curfew hours altered to extend from 10.30p.m. to 4 p.m. | |
| 13-May-1921 | | Nominations to Parliament of Southern Ireland; 128 Members returned unopposed. | |
| 25-May-1921 | | Custom House, Dublin, set on fire by armed civilians and completely destroyed. | |
| 17-Jun-1921 | | Parliament of Southern Ireland opened in College of Science, Dublin, but only four Members (Unionist) attended. | |