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 will be listed immediately in the follow-ups until marked as completed.
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 only enter an end or due date only, the task is listed immediately in the calendar until this date and, if specified, time. After the specified date, the task will be listed in the follow-ups until 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.