On January 19, 1999, Hawaii Senator Daniel Inouye (a decorated war hero of WWII http://bit.ly/ijc5Jt) introduced a bill which proposed to restore the traditional day of observance of Memorial Day back to May 30th instead of "the last Monday in May." To date, this has not occurred.
This year, however, May 30th falls on the last Monday in May and Memorial Day will be observed on the traditional date. Another easily followed tradition is to observe a moment of silence at 3pm (1500 hrs.) your local time in honor of those who have died in service to our country.