I'll never understand

Bree's school had an open house and Scholastic Book Fair last week.  As I remember going to book fairs when in my school years, I made sure my schedule was clear so we could attend and Jim, who has been working a lot lately, made sure he was home in time to leave with us at 6:30pm.  After an hour of touring her classroom, buying Jacob a new book for Christmas and eating a snack, it time to leave.  In all the Fall glorious-ness, we head out to the parking lot at 7:30pm in almost pitch black.  To which Bree turns to Jim and says:

"Thanks for letting me stay up past dark, Dad."

Why do dads get all the credit??