Ok, this is slightly a rhetorical question, but I remember growing up, Eastenders and Corrie were shows that you watched (we were an Eastenders house) after you'd had your tea or dinner, and by that point, the evening had started. To me it suggests that for most people, that's when they'd finished work and were ready to relax.
Now I'm an adult, I'm lucky if I've got home from work, had dinner, washed up by nine or half nine. Then it's almost bed time. Anyone notice that their evening is taken up by adult stuff, or is it normal to be finished and sitting down at 7.30? When are you ready to relax of an evening?