The Taoiseach has called on the public to commemorate tomorrow's first anniversary of the September 11th atrocities in the US in an "appropriate manner".
The US embassy will observe a minute's silence at 1.46 p.m., the moment of the first plane's collision with the World Trade Centre in New York, and has invited the public to make a similar gesture. It is expected that the minute's silence will be observed in offices, factories and schools throughout the State.
The Taoiseach, the Tánaiste and Cabinet members will attend a private commemoration at the US embassy. Mr Ahern and Ms Harney will attend 11 a.m. Mass at the Pro Cathedral.
TDs in Leinster House will observe a minute's silence, according to the Government chief whip Ms Mary Hanafin, although the Dáil will not be in session at 1.46 p.m.
Mr Ahern said ceremonies tomorrow "reflect the deeply-felt horror of the Irish people at the human suffering on that day, as well as the particular bonds of kinship and friendship which link us all with the people of the United States".
The President, Mrs McAleese, will observe the minute's silence, and her aide de camp will attend the ceremony at the embassy.
Commemorative services include: 6 p.m. Evensong at Christchurch Cathedral, and St Bartholomew's Church, Ballsbridge; 7 p.m. commemorative service Unitarian Church, St Stephen's Green; 8 p.m. Ceremony of Remembrance The Synagogue, Terenure; 7:30 p.m. Special Ecumenical Memorial Service Augustinian Church, Limerick City.