In the new Relationship perspective, you can edit the start and end dates for an entity.

1. From the Profile view, click Relationship perspective. The Relationship perspective displays all the relationships of the selected entity.
2. Click the relationship for which you want to edit the Start Date and End Date.
3. Hover over the Start Date and click the Edit icon.
   
4. In the Date field, enter the new start date. You can click on the Calendar icon to select the date.
   
5. Edit the End Date in a similar manner. The dates are changed.
6. Click Back to relationships to go back to the main Relationships perspective.
   Note: By selecting an inactive relationship profile and changing the end date to a future date, you can make the relationship active.