As do much of England outside of London and much of the American Midwest.
English-speaking cultures use the word "dinner" for the main meal of the day whenever it happens. Cultures that eat breakfast, dinner, and supper have a large midday meal and a small evening meal. Cultures that eat breakfast, lunch, and dinner are the other way around. It just so happens that the English-speaking cultures that make more movies and TV shows (namely London and the coasts) are breakfast-lunch-dinner cultures, so people assume this is normal everywhere.
English-speaking cultures use the word "dinner" for the main meal of the day whenever it happens. Cultures that eat breakfast, dinner, and supper have a large midday meal and a small evening meal. Cultures that eat breakfast, lunch, and dinner are the other way around. It just so happens that the English-speaking cultures that make more movies and TV shows (namely London and the coasts) are breakfast-lunch-dinner cultures, so people assume this is normal everywhere.