Tasks can have fixed start and end times, but these are optional. If dates/times are specified, however, this impacts their positioning in the Info Center, which can be either in the Calendar or the Follow-ups.

1. A task without dates or times is listed in the follow-ups until it is either completed or cancelled.
2. If you enter only a start date, the task will be listed as a full-day entry in the calendar as of this date (and, if applicable, time), until it is marked as completed.
3. If you enter only the end or due date, the task will be listed as a full-day entry in the calendar until that date (and, if applicable, time) until it is marked as completed.
4. If you specify a start and end date and times, the task will be listed chronologically in the calendar, much like an appointment. After the due date, it will be listed in the follow-ups until it is marked as completed.