Indiana used to let the counties decide what time zone they wanted to be in and whether they wanted to use Daylight Savings time or not. The majority of the state wasn't in DST, prior to this year. Meaning, half the year they were with the Central time zone and half the year they were with Eastern.
This year, all of Indiana is on DST for the first time. There are five counties in the north (by Chicago) and (I think) seven in the south that are in Central Time. The rest of the state is Eastern. And we all "fall back and spring forward", with the rest of the United States.
Evansville and Chicago will never be on the same time as Indianapolis again.
This means we've joined the rest of the U.S, and officially makes Arizona the oddball state.
I'm writing this because I have a hard time wrapping my head around this concept and an even harder time explaining it to people. So they will be referred to the blog henceforth.