boheminan
Right! I think I may be herded out of town for this, but here goes anyway...
What is supper? Meals for me used to be: breakfast/dinner/tea up until I left London in the 70's, then when I got married and moved to Oxfordshire it became breakfast/lunch/dinner, but I've never knowingly prepared a supper. From what's being said it sounds like lunch or dinner to me, I always assumed supper was a light meal, like sandwiches or a slice of cake sort of thing.
For us supper is an informal evening meal, usually eaten around 7.00pm.
Dinner would be a more formal meal.