How Naruto Knows the Time

It's a person and it was sent in by Adrian Cowles. He asks, how did the person who invented the clock know the time? It's got 12 numbers, little gears going around. And then when a little number points at one of the 12 numbers that lets you know what the hour is,. The bigger sort of arm on this one will tell you how many minutes it is. Why didn't we just also include minutes from one to 60 on the clock? Well, we wanted it to be hard for Griffin to tell what the time is even when he's 30 years old.