Didn't know supper was a word still being used. My Aunt said supper when when I was a kid. Typically we eat dinner around 6 but it can vary. Once a week we do "on your own" night to clear out leftovers and small portions of whatever is in the fridge which helps minimize waste.
I dont remember for sure but I think my Grandparents called lunch time dinner time. They referred to the evening meal as supper.
Holy crap- I guess I really am an old guy!!!!