In 1903, St Patrick's Day became an official public holiday in Ireland. This was thanks to the Bank Holiday (Ireland) Act 1903, an act of the United Kingdom Parliament introduced by Irish Member of Parliament James O'Mara. O'Mara later introduced the law which required that public houses be shut on 17 March after drinking got out of hand, a provision that was repealed in the 1970s.
The first St Patrick's Day parade in Ireland was held in Waterford in 1903. The week of St Patrick's Day 1903 had been declared Irish Language Week by the Gaelic League and in Waterford, they opted to have a procession on Sunday 15 March. The procession comprised the Mayor and members of Waterford Corporation, the Trades Hall, the various trade unions and bands who included the 'Barrack St Band' and the 'Thomas Francis Meagher Band'. The parade began at the premises of the Gaelic League in George's St and finished in the Peoples Park, where the public was addressed by the Mayor and other dignitaries. On Tuesday 17 March, most Waterford businesses—including public houses—were closed and marching bands paraded as they had two days previously. The Waterford Trades Hall had been emphatic that the National Holiday be observed.