25 April 1884: An abortive attempt was made to blow up Ship Street Barracks in Dublin on this day.

25 April 1915: Troops of the Royal Dublin Fusiliers and the Royal Munster Fusiliers partake in the landings at Gallipoli. Embarking from the steamer the River Clyde hundreds of Irishmen were lost in the attempt to get ashore in the face of devastating fire from the Turkish defenders. Many thousands of Irish born and the sons of those who emigrated also served in the ANZAC forces who fought on the beaches that day. Today is ANZAC day in Australia and New Zealand.

25 April 1916: General Lowe sent reinforcements from the Curragh to Dublin by train. More arrived from Belfast and troops were made ready in England for immediate dispatch to crush the Rising. The General decided to seal off and isolate the various strongpoints and await further reinforcements.

About 100 or so British soldiers seized the Shelbourne Hotel overlooking St Stephens Green and forced the Irish Citizen Army to withdraw under fire to the adjacent College of Surgeons. Commandant Daly had the Linen Hall Barracks in north central Dublin set alight.

Inside the GPO, work continued fortifying the building against attack. In order to improve communications, holes were tunnelled into the adjoining buildings. In this way, it was possible to move unseen from building to building.

Artillery guns from the Curragh and Templemore were used to bombard the Republican positions.

A small contingent of Volunteers from Maynooth reached Republican lines in the City after a forced march. Others arriving from the Country were not so lucky as the British tightened their hold.

Trinity College was secured and fortified by an ad hoc force of the military and was used as a base to harry communications between the various insurgent garrisons.

The South Dublin Union (now St James Hospital) garrison under vice Commandant Cathal Brugha was attacked but held out.

25 April 1938: Three Anglo-Irish Agreements were signed this day. These agreements were military, economic and commercial in nature. They gave to the Irish Free State control of the ‘Treaty Ports’ ceded to Britain in 1921 at the time of ‘The Treaty’. The IFS agreed to pay 10 million pounds to Britain in settlement of all monetary claims arising from the ‘Economic War’, which now came to an end. In addition Trade relations between Britain and the IFS were opened up once again and many of the previous restrictions removed.

Surprised there isn't a thread on this already, so here goes:

1916: First full day of hostilities during the Easter Rising.

1961: Last internee released in the Six Counties.

1965: The people of the district welcomed His Eminence Cardinal William Conway (1913-76), Archbishop of Armagh and Primate of All-Ireland.

1969: The Unionist Party announced on April 25 that the Standing Committee and the Unionist Council would meet in emergency session on May 2 and May 5

Quiet day so.