Grew up in central Indiana. Went to collage in Illinois just over the time change line. (see map link above) I would get into huge arguments about day light saving time with people in my studio.
Per my social studies high school teacher the States could all elect to observe this odd time shift. For a while even Wyoming was not doing it. Well I recall my teacher mentioning some reasons why Indiana did not jump on with the neighboring states.
1) Indiana sits about where the time change line would bisect the state and they did not want to do that.
2) At the time the rural nature of the state did not provide the impetus to make the change due to labor or energy saving reasons (the ones you hear the most).
3) Most interesting of all, my teacher mentioned that the Indiana is one of a few states that defines "time" and "noon" within the state and within state law. In Indiana "noon" is always solar noon. DLST would require a change in state law and that has never been accomplished.
After moving to Illinois DLST always gave me a odd feeling. The sun was not overhead at 12:00. I did not like having the change all the clocks. I have yet to hear a good reason for it.
(Noone may use the safety for school [censored] getting on the bus in daylight because that just does not hold)
Well, because my studio friends could not understand the Time Shift they continued to say that Indiana changes time - from "Eastern" to "Central". It does NOT change time. The surrounding states change time! Indiana is constant in time. They just could not get it.
I finally said, "OK, when DLST comes around, who gets up and changes their clocks?" Indiana does not, they do.
The only other odd effect was my two hour drive home. Depending on the time of year and direction it would appear to take 1, 2, or 3 hours.