The Battle of the Boyne, a pivotal conflict in Irish history, was fought on July 1, 1690 (Old Style). However, due to the adoption of the Gregorian calendar, its commemoration shifted to July 12th. This date is now widely celebrated by Ulster Protestants as 'The Twelfth' or 'Orangemen's Day,' marking the victory of Protestant King William of Orange over Catholic King James II. The battle significantly influenced the course of Irish history, ensuring Protestant ascendancy and shaping the political and cultural landscape of Northern Ireland.
