| Date | | | |
| 1-Apr-1920 | | Sir Hamar Greenwood, bt., appointed Chief Secretary for Ireland. | |
| Dec-1920 | | During the year numerous deaths of civilians and members of the Crown forces were caused by shootings in the city and suburbs. | |
| 22-Dec-1920 | | The Military Authorities took possession of the City Hall and other Municipal Offices. | |
| 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. | |