They should be required to do so - especially nations with American troops and countries who receive aid from the United States. We give them access to birth control and abortion, and now lend our support and encourage countries to promote gay rights and gay marriage - story here. So, these countries should at least be encouraged to celebrate our Independence Day too. Or else: No aid for you!
U.S. Imperialism at work.
Have a happy 4th of July. Be careful when handling fireworks. Don't drink and boat. Play dance/trance music really loud. (Or some classic remix.)
Song for this post here.