When dinner was still at the early time, eating a lighter supper in the evening was very common; it was not always the last meal of the day, as there might be a tea later.
Reflecting the typical custom of 17th century elites, Louis XIV dined at noon, with a supper at 10 pm.
[4] In modern usage "supper" may refer to, on largely class-based distinctions, either a late-evening snack (working- and middle-class usage) or else to make a distinction between "supper" as an informal family meal (which would be eaten in the kitchen or family dining room) as opposed to "dinner", especially as a "dinner party", a generally grander affair with guests from outside the household, which would be eaten in the best dining room.
For example, According to The Daily Meal, in Norway it is customary to start eating at about four in the afternoon and in Australia between five and seven in the evening.
During World War II, rations in the U.S. military were still divided into breakfast, dinner, and supper, using the traditional designations for meals.
In this context, supper refers to a meal typically enjoyed in the evening, consisting of a main course accompanied by thick-cut chips.