Rail passengers are advised to check times in advance of travelling this Bank Holiday Monday.
There will be a special timetable operating.
Services will depart Sligo at 11.05am, 13.05pm, 15.05pm, 17.05pm, and 19.05pm.
While return services will leave Dublin Connolly at 11.05pm, 1.05pm, 3.05pm, 4.05pm, 5.05pm and 7.32pm.
The Sligo to Dublin Connolly line will return to a full timetable on Tuesday, March 18th.