Besides the names of those killed at the World Trade Center on Sept. 11, 2001, relatives will read the names of those lost in terrorist plane crashes at the Pentagon in Washington, D.C., and in Shanksville, Pa. They also will read the names of the victims of the 1993 trade center bombing.
In all, 2,983 names will be read. In addition, the names will be inscribed in bronze on the memorial plaza.
President Barack Obama is to attend the ceremony, which also marks the opening of the national Sept. 11 memorial to relatives of the victims on Sept. 11, and to the public the next day.
The ceremony will pause six times, each representing when a twin tower was struck and fell, the attack on the Pentagon and the Flight 93 crash in Shanksville. The first moment of silence will be at 8:46 a.m. Eastern time. Local houses of worship are encouraged to sound their bells at that instant.
A "Tribute in Light" commemoration will take place at sundown, with two bolts of light shooting up into the sky symbolizing the towers.
Tickets for the national memorial must be reserved online at www.911memorial.org. The memorial museum is to open next year.
Mayor Michael Bloomberg's office informed victims' families of the anniversary details by letter this month before releasing the information Tuesday.