I've always thought that noontime 'dinner' as the biggest meal came from when more people lived on farms. I know that when I was a kid, the men came in from the fields, my mother served a large meal, and the men sat around dozing for an hour after dinner before they returned to the fields.

During the school year, we kids had 'hot lunch', which was also a large meal in the middle of the day.

Supper was light, and was hot or cold depending upon the season.

It just occurred to me to wonder why and when the US abandoned the concept of 'tea'. And it sounds like Canada also lost it along the way. Why is this?