Yes, even if there weren't a clock right there on the nightstand, measuring the passage of time in Goodnight Moon by the distance the moon travels across the sky IS overanalytical.
And our in-house astrophysicist is asleep, so I'm going out on a limb a bit to say so, but I would think calculating and tracking lunar orbit is actually "The Astronomy of Bedtime," or "The Cosmology of Bedtime."
The Astrophysics of Bedtime Stories [scienceblogs.com via, um,]
Cosmetology, perhaps, pertaining to the measurement of stars
really?
LOVE this post. Gonna steal it. Neil DeGrasse Tyson should do a followup: Bedtime Cosmology. I'd buy that!
And there's also bedtime zoolology, or "did the cow's teats burn off on re-entry?"