As someone who is from Indiana, I can chime in on this. As said in the post above, most of Indiana is in the eastern time zone. The entire state does change their clocks nowadays, which is something that started maybe 15 years ago or so (prior to that, the counties in the eastern time zone never changed their clocks).
I'm currently in one of the IN counties in the central time zone, but used to live on the western fringe of the eastern time zone, which meant that the sun didn't set in summer until like 9:30 pm. That was kind of interesting.