There will also be a number of changes to the Luas schedule due to engineering works and Easter Rising commemorations.
Red line services will be partially suspended between the Red Cow and Tallaght/Saggart on Saturday, Easter Sunday and Easter Monday due to works.
Trams will operate between The Point/Connolly and the Red Cow. Replacement bus services will run every 15 minutes in affected areas.
To facilitate Easter Rising commemorations, green line services will be closed between Dominick and St Stephen’s Green from 7am until 4.15pm on Easter Sunday.
The green line will operate between Broombridge and Dominick, and between St Stephen’s Green and Bridges Glen.
Luas services will be on a Saturday schedule on Good Friday, a Sunday schedule on Easter Monday, and return to normal weekday hours from Tuesday.
Irish Rail commuter train.
Today’s news in 90 seconds – Thursday, April 2
Passengers have been advised to plan ahead and allow extra time for journeys.
From Saturday of Easter weekend until Easter Monday, several works will be carried out at locations between Connolly and Dún Laoghaire stations in Dublin.
As a result, Dart services will be suspended between Connolly Station and Dún Laoghaire. Irish Rail has advised customers that Leap Cards used for rail travel are valid on TFI services in the affected area.
Dart services will continue to operate between Howth/Malahide and Connolly, and between Dún Laoghaire and Greystones.
Services from Connolly Station to Rosslare Europort will involve bus transfers between Connolly and Bray.
Services in the west of the country will be affected by works from the evening of Good Friday until the morning of Easter Monday, including the continued construction of the new Ceannt Station in Galway city and the expansion of Oranmore Station.
Dublin Heuston to Galway services will be a bus replacement for the full journey, while Heuston services to Westport will involve bus transfers between Heuston and Athlone.
Limerick to Galway services will involve bus transfers between Athenry and Galway.
In the Cork area, works will be carried out on Saturday and Easter Sunday. Cork commuter services to Cobh, Midleton and Mallow will involve bus replacements as a result.
Rail services from Cork to Heuston Station, and Cork to Tralee, will both involve bus transfers between Cork and Mallow.
From 1.30pm on Saturday, there will be bus transfers in operation between Limerick and Limerick Junction to facilitate track works.
“Iarnród Éireann apologises for the inconvenience caused by these essential works,” a spokesperson said.
Commuters have also been advised to check Irish Rail’s app or website before travelling between Good Friday and Easter Monday, with revised timetables in place across all routes.
On intercity services, the advice is to book in advance, particularly at the busiest times.
On Good Friday, a Saturday schedule will be in operation on Dart services, while a revised Saturday schedule will be in place on commuter services.
Across all routes, there will be revised times between Saturday and Easter Monday, including Sunday service on Dart services from Howth/Malahide to Connolly, and Dún Laoghaire to Bray/Greystones, as well as other commuter services.