By Jane Standley BBC correspondent in New York

The names of all 2,800 people killed in the terrorist attacks of 11 September will be read out during a ceremony in New York to mark the year anniversary.

Mayor Michael Bloomberg and State Governor George Pataki announced details of the ceremony on Tuesday, saying 4,500 people had made ''remarkable and thoughtful'' contributions on a public hotline.

The ceremony will begin at 0846 at Ground Zero, exactly one year since the north World Trade Center tower was hit by American Airlines Flight 11.

The names of the dead will then be read aloud, some by the former mayor of New York, Rudolph Giuliani, and others by relatives of the victims.

Bagpipe procession

Family members will be allowed onto the World Trade Center site for the first time. Many of them regard it as a burial ground.

Part of the ceremony will honour the fallen rescue workers

Each of the families will put a rose in a vase for an arrangement that will later form part of the permanent memorial.

The ceremony is set to last for 102 minutes, the exact length of time between the impact of the first plane and the collapse of the second tower.

The day will start with a bagpipe procession from each of the five boroughs that will honour the rescue workers killed.

Sombre and highly symbolic, the Ground Zero ceremony will also include readings from the Declaration of Independence and the Gettysburg Address, the founding texts of American democracy.

September 11 will live in people's hearts and minds for generations just as December 7

New York Governor George Pataki

Places of worship will be encouraged to toll their bells and to open their doors to people who need them.

President George W Bush will visit New York later in the day and visiting heads of state will observe the lighting of an eternal flame.

But as Mr Bloomberg announced, it will be a working day for schools and businesses, a sign that the city has triumphed even as it is thinking of those it has lost.

Governor Pataki said: ''September 11, that date, will live in people's hearts and minds for generations just as the date December 7 will never be forgotten even by people who were not alive when it happened.''