Obama's dating system

I was browsing through some White House photos published online, and saw one of where President Obama signed a wall in a high school.  The interesting part of the signing was not the note he wrote, but rather the way he wrote his date.  Instead of putting June 11, 2009, he put 11 June 2009, which is how Europeans, not Americans, write their dates.

Obama date and signature
I was browsing through some White House photos published online, and saw one of where President Obama signed a wall in a high school.  The interesting part of the signing was not the note he wrote, but rather the way he wrote his date.  Instead of putting June 11, 2009, he put 11 June 2009, which is how Europeans, not Americans, write their dates.

Obama date and signature