a May 26 selected anniversary''. 

Encyclopaedia Britannica has the date that this Act was passed as May 15, 1830. – 

Good catch. The difference lies between "passed" and "signed": the House passed the Act on May 26, but Jackson signed it on May 28. I have no idea how or why May 26 came to be a Wikipedia "selected anniversary," but the signing is probably the more significant date. Regardless, I'll clarify the dates in the article.  23:31, May 25, 2005 (UTC)

ugh. someone edited the main page, please retype the facts...