Err... Indiana (with the minor exceptions, of course) doesn't change from Eastern to Central for 6 months of the year. It looks that way, but what actually happens is Indiana stays in Eastern Standard Time year round. This time zone is defined to be 5 hours behind GMT (and so is Central Daylight Time, but we don't observe daylight savings, so that is obviously not the right time zone). Eastern Daylight Time, on the other hand, is defined to be 4 hours behind GMT.
Personally, I think all the arguments for DST are bullshit.
For what it's worth, I lived in Michigan for two decades and never liked changing clocks twice a year. Go Indiana.
