You can access the Date and Time Settings page from the Create Project Activity wizard or the Edit Activity Properties wizard.
Date and Time Settings Window
Start Time: Enter or select the date and time when the activity will begin.
End Time: Enter or select the date and time when the activity should end.
Dependencies: select any other project activities that must end before the activity can begin (optional). If you selected a dependent activity, a confirmation window appears stating that the start time of the activity must be after the end time of the selected activity and offers to set it accordingly.