WASHINGTON (AP) - Instead of "Hail to the Chief," President Barack Obama most likely heard strains of "Happy Birthday" this weekend.
Obama, who turned 52 on Sunday, spent part of the day at the Camp David presidential retreat in Maryland.
The White House said little about how he celebrated.
The president played golf Saturday with friends from his days in Hawaii and Chicago. Some of them joined him at Camp David.
Obama said nothing upon his afternoon return to the White House.
His week ahead includes a trip Tuesday to Phoenix to discuss plans to help homeowners, an appearance on "The Tonight Show" with Jay Leno and visit Wednesday with troops at Camp Pendleton in California.
He also has a White House meeting Thursday with the prime minister of Greece.