Independence Day: The first Thursday in Iyar?

I was a kid when the US decided to make most of their holidays be on Monday's so that people could have long weekends. I thought it was pretty dumb then (George Washington was not born on the first Monday in February and I doubt most kids in the US today know when he was actually born), but at least there were some days that were not changed. One of them was Independence Day, which remains July 4