President Obama and first lady Michelle Obama will attend a civil rights summit in April and help commemorate the signing of the 1964 Civil Rights Act, the White House announced on Thursday.

“On Thursday, April 10, the president and first lady will travel to the Lyndon Baines Johnson Presidential Library in Austin, Texas to deliver remarks at a civil rights summit to commemorate the 50th anniversary of the signing of the Civil Rights Act,” White House press secretary Jay Carney said.

According to the LBJ library, Obama will also be joined by three former presidents: Jimmy Carter, Bill Clinton and George W. Bush, all of whom are also scheduled to speak during the three-day summit.

“We are truly honored to host President Obama as the keynote speaker at the LBJ Presidential Library’s Civil Rights Summit in April,” said the library’s director, Mark K. Updegrove, in a statement.

“The world has evolved considerably in the half century that has passed since the signing of the 1964 Civil Rights Act. As our first African American President, Barack Obama is the fulfillment of the promise of the Civil Rights legislation delivered by President Johnson and a bipartisan Congress,” he added.