It is bad to be late with things.
Jenny is working on her math homework for tomorrow and doesn't think that she will finish in time.
Jenny wants to get a good grade.
Jenny finishes as much as she can, leaves a few problems blank, and turns in the homework.
Jenny keeps the homework, finishes it, and turns it in a day late.
The teacher deducts some points for the missing problems but still gives Jenny a good grade.
The teacher deducts 20% of the points for the homework assignment because it's late.