I'm specifically referring to a post, earlier today, by the U.S. Embassy in Moscow on their Facebook page.
It is an unofficial "production" by an enthusiast, and although the transitions between the portraits of the presidents are a little awkward, I did find it very creative. And well, in a sense, it's a great example of people-to-people diplomacy, simply facilitated by the official capacity of the Embassy.
Another interesting note: the quote from George H.W. Bush (the Senior):
"We don't want an America that is closed to the world. What we want is a world that is open to America."
Way to go.
Read more about the President's Day.
UPDATE: I also stumbled upon this piece, which I thought was a fun read: "George Washington’s Rules for Social Media."