Texas has, in recent years, changed the dates at which they adopted DST more than once (it was something to do with Halloween trick-or-treating and candy lobbyists).
edit: to answer my own question: there are some rumors about candy manufacturers influencing legislators to implement dst after Halloween so more children would partake and they would make more money. Doesn't seem to have anything to do with Texas in particular and might not be true at all.
But please correct me if I'm wrong.
