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Jacquelyn Martin, File, Associated Press
FILE - In this Jan. 13, 2011, file photo Massiah Butler, 9, right, and Kaya Myers, 9, raise their hands, linked with other fourth-grade students from Watkins Elementary, after reciting Martin Luther King Jr.'s "I Have A Dream" speech, spoken by King in 1963 on the same steps of the Lincoln Memorial in Washington. Monday, Jan. 17, 2011, marks the 25th federal observance of the birth of King, one of America's most celebrated citizens, and the only non-U.S. president to be honored with a national holiday.

ATLANTA — The eldest son of the Rev. Martin Luther King Jr. is expected to address a crowd of hundreds gathered to mark the 25th anniversary of the federal holiday named for his father.

Martin Luther King III, president and chief executive officer of The King Center, will deliver the keynote address at the annual holiday observance in Atlanta, held at Ebenezer Baptist Church, where the civil rights icon preached from 1960 until his death in 1968.

King would have been 82 on Jan. 15. Members of the King family will also lay a wreath at the tombs of Martin Luther King Jr. and his widow, Coretta Scott King.

King is the only American who was not a U.S. president to have a federal holiday named in his honor. He has been recognized on the third Monday in January since 1986.