Tom had this problem of getting up late

Tom had this problem of getting up late in the morning and was
always late for work. His boss was mad at him and threatened
to fire him if he didn't do something about it. So Tom went to
his doctor who gave him a pill and told him to take it before he
went to bed. Tom slept well and in fact beat, the alarm in the
morning. He had a leisurely breakfast and drove cheerfully to
work. "Boss", he said, "The pill actually worked!"

"That's all fine" said the boss, "But where were you
yesterday?"