Americans are accustomed to seeing their presidents dressed dapper in suits, ties and fancy shoes. But on the rare occasion that a president appears in casual attire, we're granted a lucky glimpse of normalcy.
President Barack Obama walks the ninth green as he plays golf at the Mid-Pacific Country Club in Kailua, Hawaii, on Dec. 28, 2010.
President Barack Obama fist-bumps with his friend Eric Whitaker while golfing in Asheville, N.C., on April 23, 2010.
President Barack Obama reads a list of orders for shaved ice at Island Snow Hawaii while on vacation in Kailua, Hawaii, on Jan. 1, 2010.
President Barack Obama warms up for his ceremonial first pitch at the MLB All-Star Game on July 14, 2009.
President George W. Bush and Prime Minister Anders Fogh Rasmussen of Denmark ride bicycles together at Bush's ranch in 2008.
President George W. Bush reacts to reporters as he gets out of his truck upon his arrival at his ranch in Crawford, Texas, on May 20, 2007.
President George W. Bush throws the first pitch at a St. Louis Cardinals game at Busch stadium on April 5, 2004.
President George W. Bush wore a casual button-up shirt when he signed a law at his Texas ranch in 2005.
President George W. Bush dressed appropriately for some work on his Texas ranch on Aug. 9, 2002.
President Bill Clinton points out the lay of the ball after former President George H.W. Bush's tee shot at the start of a round of golf on Feb. 15, 1995.
President Bill Clinton misses a pass during a pickup beach football game on Dec. 31, 1993.
South Korean President Kim Young Sam talks with President Bill Clinton on Nov. 20, 1993, before the start of Asia-Pacific Economic Cooperation (APEC) conference meetings.
President Bill Clinton stretches while fellow jogger Karen Mancuso stretches during a run along the San Francisco marina on July 5, 1993.
President-elect Bill Clinton with his wife Hillary take a short stroll outside the governor's mansion in Little Rock, Ark., on Nov. 4, 1992.
Democratic presidential candidate Bill Clinton and his wife Hillary pedal bicycles on Sept. 16, 1992, along the bike path in Santa Monica, Calif.
President George H.W. Bush clenches a golf tee between his teeth during a round of golf in Kennebunkport, Maine, on July 12, 1991.