This would be very useful when a task starts to be executed, but is not completed within the scheduled dates/hours.

Everytime I need to reschedule the task for a new date/time, I lose records of past appointments on the calendar. It would be great if I could reschedule a task, AND keep track of the previous day/time.

This way, it would be much simpler to keep an eye on tasks that normally need to be rescheduled and how many hours they typically require from our original schedule.

It would be much simpler to see how many hours were scheduled (and when) for the task throughout the week, for exemple.

Furthermore, sometimes I need to schedule the same task for two different periods. For example: Monday, from 9 am to 11 am, and also for Wednesday, from 9 am to 10 am.