Have a good day

S: So when I get home from school tomorrow, I'm going to tell you I had a good day and then I'm going to go out on the deck and look at the baby birds.

D: That sounds like a good plan.

S: I pretty much always have a good day. And when I don't have a good day then I know the next day I'm going to have a good day. Because when I have a bad day I make sure I'm going to have a good day the next day so that I, um, so that, uh, every day, is... [here Stellan struggles to think of a word for the concept "average" which he has just independently invented, and I struggle not to interrupt him with a language lesson] ...so that I have um always the same number of good days.

D: I think maybe I need to learn how to do that too.