Which is it?

They are all correct, in different countries and in different parts of the United States.

Dinner is the main meal of the day on Sundays, but it is usually served right after church...around 2 p.m. I should have added, dinner is also served as a more formal evening meal.

Luncheon, or lunch, is usually whatever can be crammed in on the noon break at work, and supper is similar to dinner, but is more of a country term. My mother always used the word, "supper" to describe our evening meal.

In the UK, Tea or High Tea is served in the afternoon or early evening and is a casual meal of sandwiches, possibly soup, and dessert. Similar to a casual supper in the USA.

Breakfast lunch supper closet-eating.

Dog food, Dog food, Dog food

Breakfast lunch dinner. My great grandmother said breakfast dinner and supper and I've never heard anyone else say that.

My family has always had breakfast - dinner -supper

When I was a kid, breakfast, lunch and supper. We only went out for dinner (rarely) or had Sunday dinner instead of lunch.

Breakfast, dinner and supper. I’m country.

Breakfast - Big meal, get ready for the day.

Dinner - Noon day, and biggest meal of the day to carry you til sundown.

Supper - Smallest meal. Light snack, little after sundown to help send you to sleep.

What about second breakfast?

Breakfast
Lunch
And
Tea

Monday-Friday
Breakfast
Lunch
Supper

Saturday
Brunch
Supper

Sunday
Breakfast
Dinner

For our household: Breakfast, Lunch, and Dinner, usually. I guess once I a while I'll say supper, but rarely.

Breakfast, lunch, and dinner..for most of my life that's what I termed it

Breakfast, lunch, and dinner is what we always said.

Breakfast, Lunch and Dinner

Brunch and lupper or linner

Breakfast,dinner then tea

Food , food and food.

Cereal
Luncheon
Supper