The Moment of Enlightment:
6 year old boy: "Hey! I know how parents can know when to do their kids' birthdays: By the day they were born!"
Yes, my little scholar. That would be a good way. As the table is erupting in laughter at his naivety, I comfort him with a story about myself when I was in Kindergarten.
The teacher asked me when my birthday was that year. I said "November 21st". We go around the circle asking all the kids. When it gets back to me, she says, "And when will your birthday be next year?" (Trick question!) I say, "I don't know. We haven't planned that far ahead yet."
Apparently, tragically, the apple doesn't fall too far from the tree.