What day did Barack Obama say yes you can?

Answer 1

There is probably not one specific day when he said this. Actually, it was part of his presidential campaign. When candidates are running for office, they try to come up with a slogan that will be catchy and also inspirational. When Mr. Obama, then a U.S. senator, was trying to become president in 2007-2008, he and his campaign created the "yes we can" slogan to represent that we (the American people) can make changes, get get things done, can do more than we thought we would be able to do.