Comment 2 for bug 734622

Also, perhaps another attribute is necessary: end date. Some periodic tasks could have an end date, others repeat infinitely. Perhaps the user could be let to enter a number of desired repetitions.
This functionality can in fact go very deep - these periodic tasks could also have an amount of anticipation days (which would be like the start date of a normal task: it would determine the amount of days you have between the time you start working on a task and its due date).
Adding all this information to a task might be sometimes unnecessary and boring, so as with the normal tasks, a default behavior needs to be defined.