Anyone who happens to be in and around Dublin's city centre tomorrow lunch time will be more than a little curious at the sight of a 1,000-strong force of unionist politicians, Orangemen, and loyalist bands marching on the streets.
The parade has been organised by a group representing victims of IRA violence, Families Acting for Innocent Relatives (Fair).
Starting at 12.30 tomorrow the marchers will travel down O'Connell Street and D'Olier Street, past Trinity College and up Kildare Street to Leinster House, where they will congregate for a meeting.
A Garda spokesperson said commuters could expect severe disruption to traffic in the area.
Traffic can also be expected to be heavy around Fairyhouse race course, Co Meath, for the meeting there tomorrow, and around the Naas race course on Sunday.
Also on Sunday, Ireland take on Six Nations champions Wales at Lansdowne Road with the match kicking off a 3pm, so traffic will be very heavy in and around Dublin 4. Commuters can expect Dart trains to be full of rugby supporters before and after the match.
There are National Hurling League matches in Cork city, Thurles and Wexford on Sunday. All games have a 2.30 throw-in.