I live by myself so I don't call it anything. I just eat when I am hungry no matter what time it is. I don't have a problem with eating bacon and eggs at 10:00 PM.
But I grew up in the north west so I guess I would call it dinner.
Dinner was at noon. Supper was the evening meal. This was in the
Appalachians.
In southern Indiana farm country lunch was noon and dinner was evening meal.
I never bothered to find out how this came to be and now everyone is gone tht I oculd ask.
I was confused when my husband would call the noon meal dinner and the meal at night supper. He apparently had never heard of lunch. After 50 years he knows when I tell him what we are having for dinner it means what we are having it for the evening meal. We are both from Michigan.
Growing up it was always breakfast, then dinner at noon, and supper was at about 6 pm. I loved it that as I wouldn't ever go to bed on a full stomach and be uncomfortable until I finally could fall asleep. DW's eating schedule growing up was closer to the dinner at night syndrom as her parents were HS teachers but they ate their dinner at home at about 5 pm. Long time till bed time left.
My whole system had an awful time changing after college as owning a business etc meant taking customers etc out to dinner very often in the later evening. That meant well after 7 pm and a coctail or two and many times of actually eating the main course at 8:30-9:30+ pm. Yup, DW was usually there too so we could have our meal together. The dinner was followed by as light of a dessert as was offered or none at all for us but our guests could have anything they wanted. I and we would really felt lousy and stuffed at bedtime so I/we would stay up and do something for exercise etc for a couple hours rather than just being miserable laying in bed for that couple hours. It sure helped. Many times, if no evening entertainment dinner out was scheduled, I'd eat a hefty steak etc for lunch and basically a very light to nothing at all at suppertime. I care about my weight and trim and I always have. Yes, I could stand to have lost 10-15 lbs even still today but that's a long way from the potbellied average male blimps I see and especially around my age of 70.
Heavy evening meals really sucked especially since I really love and desire a big thick medium rare prime rib or steak, potato, and vegtable!!! Salads are "rabbit food" to me and my ears aren't long and my nose doesn't wiggle! However, a nice Caesar Salad with a thick pile of freshly grated Parmesan and Romano cheese covering the Romaine so that I can't see it goes down real easy.
For 40 working years, weekends and holidays were back to our growing up meal schedules as much as possible and we do now in our retirement. Dinner at noon roughly 6 out of the 7 days in a week and a simple tasty supper. Makes that small bowl of ice cream or sherbet covered with fruit etc about 9 pm taste really special and doesn't keep me awake after hitting the bed.
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When I was growing up, it was breakfast, lunch and dinner. But I had read that Dinner is considered the big meal of the day, whenever it is eaten. When this country was largely agricultural, from Monday thru Saturday, Breakfast was before work, lunch at mid-day and Dinner after work. But on Sunday, Breakfast was before church, Dinner, the big meal of the day, was after church, and Supper was a light meal in the evening.
I googled "breakfast, lunch, dinner" and got 2,580,000 results. The ones I looked at, agreed with me.
Retired and visiting as much of this beautiful country as I can.
Growing up on the farm, it was Breakfast, Dinner at Noon, Supper in the evening with a mid-morning lunch & a mid-afternoon lunch. It was the same for DH so we've always kept it as such, except we don't "lunch".