A man had been driving all night and by morning was still far from his
destination. He decided to stop at the next city he came to, and park
somewhere quiet so he could get an hour or two of sleep. As luck would have
it, the quiet place he chose happened to be on one of the city's major
jogging routes. No sooner had he settled back to snooze when there came a
knocking on his window. He looked out and saw a jogger running in
place."Yes?" 
 
"Excuse me, sir," the jogger said, "do you have the time?" 
 
The man looked at the car clock and answered, "8:15". The jogger said thanks
and left. The man settled back again, and was just dozing off when there was
another knock on the window and another jogger.
 
"Excuse me, sir, do you have the time?" 
 
"8:25!"  The jogger said thanks and left. Now the man could see other
joggers passing by and he knew it was only a matter of time before another
one disturbed him. To avoid the problem, he got out a pen and paper and put
a sign in his window saying, "I do not know the time!" Once again he settled
back to sleep. 
 
He was just dozing off when there was another knock on the window. 
 
"Sir, sir? It's 8:45!"