Forgetting

We have gotten them to preschool on time all year.
We have always arrived to preschool on time to pick them up.
Snacks were packed every day and not forgotten.
Snow boots were sent in the wintertime
Rain boots were packed in the spring.
Permission slips were filled out and returned.
We participated in fundraisers and open houses and science fairs.

Why then,
As their teacher kisses each child
On on both of their cheeks
And their foreheads,
And wishes them good luck in the fall at their new school,
Do I feel SO GUILTY
That I had NO IDEA
Today was the last day of preschool?