Ah, I meant Dinah's line as "come any time in the day as long as it's a weekday, lol" but I'll clear it up. The weekends line is clearly a bit ambiguous.
On events and choices, I'm afraid they do have meaning and can lead to alternate conversations and events, etc. I too dislike losing out on events but I was forced to choose between having players miss out on some or having your every choice be meaningless.
I decided that I dislike it more when a game pretends to offer me choices, but those choices never matter for anything other than maybe a different CG at the end of the game.
That said, not every choice causes events to be missed, etc. A lot of choices give "points" behind the scenes that will eventually tally up and decide routes. That's when events may change. The next global update on 1st August will actually reveal those points and what score you're at for several characters. Dinah is one such among them.