WHOSE TIME IS RIGHT?

There was a man who works as a foreman at a factory.
Every morning on his way to work , he would pass a
particular shop selling watches. He will stop in front
of the shop and adjust the time on his wrist watch, and
will then proceed to work. He will do this everyday.
The watch shop owner became very curious and one day
stopped the man and asked him what he was doing. The
man said that he was the foreman of the factory and
everyday it was his duty to ring the bell to sound the
alarm at 5.00pm to indicate that it was time to stop
work for the day. He wanted to be accurate with the
time and therefore everyday he would look at the big
clock in the shop to adjust the time on his wrist
watch. The shop owner started laughing! He said,
“Everyday at 5.00pm when the factory bell sounds the
alarm, I would quickly adjust the time on my clock”.