One consequential change is that people used to get most of their calories at breakfast and midday, with only the evening top-up at suppertime. Now those intakes are almost exactly reversed. Most of us consume the bulk--a sadly appropriate word here--of our calories in the evening and take them to bed with us, a practice that doesn't do any good at all.
Bill Bryson, At Home: A Short History of Private Life
breakfast, calories, dinner, food, lunch, mealtime