Because it's a ritual, I guess. Because this is the last day the big yellow bus will come to our corner for two and a half months.
Because Fairfax County Public Schools close for the summer today and when they reopen in September it will be the first time since 1994 that one of my children isn't enrolled.
This is a good thing, of course, what is supposed to be. But today, just a brief backward look, not of longing or of regret, but of fullness, significance. A nod to time passing. A nod to change.