I don't get you people who think this is a good idea.
Why do we need it to be daylight at 9pm in the summer time? Why not leave the clocks alone and it would get dark at 8pm in the summer and we wouldn't have to spend weeks dealing with all the wrong clocks since no one knows which direction to turn them because it's either Spring Forward and Fall Back or Fall Forward and Spring Back and regardless what the hell does Fall back even mean?
Some states don't participate--because it's stupid. You still have 24 hours in a day no matter what you do to the clocks.
I say you want to change the clocks-- let's REALLY go for it--
Three times a year, without warning-- we must alter the clocks-- go back 2 hours if it falls on the fifth Wednesday or before unless it's a leap year which in that case go ahead 3 hours unless your last name starts with K in that case add or subtract an hour of your choice.
Let's just make it so no one knows what the hell time it is anymore.
Why not-- it makes just as much sense.