You're right. But we had Lee and Jackson Day long before the other 49 states had Martin Luther King Day.
(I'm just trying to be cute by echoing your formatting. I wasn't being snarky! I think it's a dumb holiday too.)
Actually my favorite comment regarding this holiday was an anonymous comment in a local newspaper (our local newspaper sucks so the best part of it is a two-page rant by anonymous citizens about anything under the sun) that said, essentially, "Why do we have Lee, Jackson, King day? I can see how Robert E. Lee and Martin Luther King were important, but why does Jesse Jackson get to have his own day?"
I haven't ever really stopped laughing at that. The thought that someone would look right past the *enormous* irony of having the same day celebrate Robert E. Lee and Martin Luther King, to rush into such a bizarre assumption.