Harlem's Apollo Theater is where a young Jackson and his brothers won amateur night. On Friday it hosts a commemoration of his life.
The Rev. Al Sharpton is a longtime Jackson family associate and plans a moment of silence around the time Jackson died.
City officials in Gary, Ind., say there will be a tribute at the family's home there.
Barricades already are set up at Jackson's Los Angeles-area cemetery for the huge throng of fans and some of his relatives expected to arrive Friday. Wreaths of flowers and dozens of bouquets, drawings and photos of Jackson have been placed outside his mausoleum.