Why should we celebrate US-imposed International(!) Friendship Day?

Today, I came to know the history behind "International" Friendship Day. After reading about it in wikipedia (http://en.wikipedia.org/wiki/Friendship_day) I was wondering why it's called "International.."! In my opinion it's utterly "American" Friendship Day. So why should the entire world celebrate? Friendship is something which can be celebrated each and every day of the year. We Indians, especially Bengalis are culturally superior to Americans. Why should we imitate them in every aspect of lifestyle? Why should Yankees teach us what friendship is? Isn’t that ridiculous? I think it's a form of cultural imperialism that is practiced applying the theory of cultural supremacy of the fascists Yankees!