So what was Obama's birthday like?
After spending the morning of his milestone birthday working in the Oval Office, the president headed to the Blue Room of the White House for a celebration with top aides. White House chefs were spotted cooking chicken and burgers on outdoor grills.
Later, Mr Obama was celebrating with family and friends, including some who came in from his hometown of Chicago, in the Rose Garden. The president's oldest daughter, Malia, also made it home from summer camp in time to celebrate her dad's 50th.
Even on her husband's birthday, Michelle Obama couldn't resist poking fun at his greying hair.
...During a video conference with some of the more than 1000 birthday-theme house parties his supporters held coast-to-coast yesterday, Mr Obama got a serenade from a group in North Carolina, while supporters in Ohio held up signs wishing the president a happy 50th.
The Obama family will cap their birthday celebrations with a weekend trip to Camp David, the presidential retreat in Maryland.Check out this site for other presidential birthdays. Here's a fun tidbit on FDR's birthday: