I have a SW nerd friend who recognizes the anniversary of the premiere of Episode I (May 19, 1999) and always mentions it when it rolls around. Which is cool. I actually like Episode I, but I don't think there are too many souls in this country no matter how fiendishly geeky they might be that pay tribute to May the 19th and celebrate The Phantom Menace.
That kind of thing will lead to bodily harm in some circles.
Well, it's also the date that REVENGE OF THE SITH was released in 2005, and I think everybody agrees that THAT was the better movie (at least I think so).
You could always tell you friend to just mention that instead.