I am not sure if this is accurate for the rest of Europe, but it is accurate for Sweden. I have always liked eating dinner at 6pm so that I am not full when I go to sleep at about 10pm. . Sweden also eats lunch early (from about 11am to noon), so I am hungry by 6.
And then there’s the regional/class UK debate regarding lunch/dinner/dinner/tea/supper . Truly a moveable feast 😅
Us Californians like an early supper also. The Blue Plate Special starts at 4pm! (for the seniors…also is discounted…)