It's happening, and I can feel it.

I think I'm happy about it. It's like it always happens. Painfully slowly, and then all at once.
It's looking out your window day after day, and it always being summer. Then one day, you look, and all the leaves have fallen without your notice.

It's carrying your backpack on all day, and then taking it off at day's end.
I mean... it's definitely time, I'm just apprehensive, as always.