The 'Reschedule' feature in the Releases menu will allow you to update the Start and/or End dates after the Release has been submitted. After you have submitted the release, you will need to highlight the release that you would like to edit, then click 'Releases'. In the menu that displays, select 'Reschedule'. In the 'Reschedule Release' window, you can edit the Start and/or End date to the desired date. Once you have selected the desired date(s), click the 'OK' button. Once the 'Reschedule Release' window closes, you will then see the changes in the 'Details' section.