Almost a quarter million documents connected to Martin Luther King, Jr. were published online Monday as the nation celebrates the civil rights leader.

The 200,000 documents, posted by The King Center Imaging Project, include original copies of King's speeches, letters, telegrams, articles, photos, and sermons.

The Martin Luther King Jr. Center for Non-violent Social Change in Atlanta and JPMorgan Chase & Co. are responsible for the project.

"Our valued relationship with JPMorgan Chase and their innovative Technology for Social Good program is helping to preserve and extend my father's important message to sustain the momentum of non-violent social change around the world," said Martin Luther King, III, president of The King Center.

In 1994, the day meant to honor King's birthday and legacy also became known as a national day of service.

President Barack Obama and the first family spent the day building bookshelves for a Washington, D.C. school library.

"There's nobody who can't serve, nobody who can't help somebody else," Obama said. "Whether you're seven and six or whether you're 76, you can find opportunities to make an enormous difference in your community."

On Sunday, the Obamas celebrated King's birthday with the congregation of the historic Zion Baptist Church in Washington, D.C.

The church was started by African Americans who moved to the nation's capital from the slave state of Virginia during the Civil War.

King was assassinated 44 years ago after serving the Civil Rights Movement for 15 years.