U.S. President Barack Obama plans to meet with Cuban President Raul Castro for the second time this year, the Associated Press reports.

The meeting is scheduled to take place Tuesday, September 29, on the sidelines of the annual UN gathering of world leaders in New York. Castro is attending for the first time.

The encounter comes as the Cold War adversaries go about the long and complex process of normalizing relations following decades of animosity. The U.S. recently eased rules for citizens who want to visit or do business in Cuba. The aim is to foster greater economic freedom on the island.

Both leaders surprised the world last December by announcing an agreement to restore diplomatic relations.