When was the Lafayette (The purdue area) on central time? At least 23 years ago it was on eastern, though I think a couple counties to the west was central time

When was the Lafayette (The purdue area) on central time? At least 23 years ago it was on eastern, though I think a couple counties to the west was central time, which was pretty common with cities dependent more on cities in Illinois than greater Indiana or Ohio. (Gary, for example, or Terre Haute might have been as well, though that memory is fuzzy). Source: Graduated high school about an hour from there, then lived in different small towns outside of the area. Was pretty popular for folks to go party at purdue on the weekends if you knew someone there and had willing enough parents. This was both before the adopted DST and after.