I tend to think of dinner as the evening meal, but I usually call it supper. One year, I was very excited to be invited over for Christmas dinner at my boyfriend's house. The arrangement was that I would phone him when I got home from my family's celebration. So I did, at 1 pm, figuring I had plenty of time to get there by 5 or 6. Imagine my dismay when he said they were just about to sit down to "dinner". Darn! Should've clarified things ahead of time.