I'm Canadian and a native speaker of English. Dinner and supper are both used to refer to the main meal during the day. Dinner is often, not always, used for a formal dining experience such as going to a nice restaurant. When it's an informal meal at home, supper is still used regularly. The notion that supper is antiquated is not accurate, at least not in North America.

In the United States, this varies a LOT, and not just regionally but on a family-by-family basis. When I was a kid in my family, we called the meals "breakfast, lunch, and supper," and reserved the word "dinner" for special occasions like Christmas and Thanksgiving. Christmas and Thanksgiving dinners were typically eaten in mid-afternoon, around 2 or 3 pm. We would also used "dinner" for an especially big or fancy meal, perhaps at a restaurant. We would eat "supper" at home by ourselves, but "go out for dinner" or "have someone come for dinner." My understanding is that on farms and ranches there is a tradition of eating the biggest meal at mid-day. In cities and towns, people who leave home and go to work usually call the meals "breakfast, lunch and supper" or "breakfast, lunch, and dinner."

Good question! I'm native English. In northern England people say breakfast, lunch and tea! I live in southern England and many call the evening meal "tea" too. Which I personally don't like because we drink a lot of tea! To add to the confusion, in the past northerners called lunch "diner" and supper was a snack before bed. Which sounds similar to what someone said about how Malaysia use the word. Generally it's breakfast, lunch and dinner/ supper. I'd say use "dinner" because "supper" is more informal and rarely used.

hi