DH says Tea. Dinner is what he has in the middle of the day. He is from The North, and I do keep telling him. 
As far as I'm concerned, we have lunch at, um, lunchtime, and then DS1 has tea between 5 and 6.30pm (not for that entire period obviously, but the feast is slightly moveable depending on intensity of his hunger, whether he's very tired or not and how lazy I'm feeling). DH and I have supper tea supper tea (depending on whoever is serving up) any time between 7 and 10, this time depending on how long it took to get DS1 to bed. 
I love the idea of cramming yet another meal into the day ('proper' supper) but frankly don't think we have time. We'd have to go to bed at 2 or something. 
(oh, and when we stay with DH's family, we have to eat the lunch-equivalent meal bang on at midday, and tea is at 5pm. For everyone, adults too. It's ok for PIL, they go to bed at 8 bloody 30!
I am raiding their fridge by 9.)